diff --git a/packages/client/src/api/hermes/system.ts b/packages/client/src/api/hermes/system.ts
index 5e2fe0aa..3c927289 100644
--- a/packages/client/src/api/hermes/system.ts
+++ b/packages/client/src/api/hermes/system.ts
@@ -41,8 +41,8 @@ export interface AvailableModelGroup {
   available_models?: string[]
   api_key: string
   builtin?: boolean
-  /** 可选：模型 ID -> 元数据（preview/disabled）。目前仅 Copilot 提供。 */
-  model_meta?: Record<string, { preview?: boolean; disabled?: boolean }>
+  /** 可选：模型 ID -> 元数据（preview/disabled/alias）。alias 仅用于 Web UI 展示。 */
+  model_meta?: Record<string, { preview?: boolean; disabled?: boolean; alias?: string }>
 }
 
 export interface AvailableModelsResponse {
@@ -50,6 +50,8 @@ export interface AvailableModelsResponse {
   default_provider: string
   groups: AvailableModelGroup[]
   allProviders: AvailableModelGroup[]
+  /** Web UI-only display aliases keyed by provider -> canonical model ID. */
+  model_aliases?: Record<string, Record<string, string>>
   model_visibility?: ModelVisibility
 }
 
@@ -90,6 +92,17 @@ export async function updateDefaultModel(data: {
   })
 }
 
+export async function updateModelAlias(data: {
+  provider: string
+  model: string
+  alias: string
+}): Promise<void> {
+  await request('/api/hermes/model-alias', {
+    method: 'PUT',
+    body: JSON.stringify(data),
+  })
+}
+
 export async function addCustomProvider(data: CustomProvider): Promise<void> {
   await request('/api/hermes/config/providers', {
     method: 'POST',
diff --git a/packages/client/src/components/hermes/models/ProviderCard.vue b/packages/client/src/components/hermes/models/ProviderCard.vue
index 7e20ddd1..3db43aed 100644
--- a/packages/client/src/components/hermes/models/ProviderCard.vue
+++ b/packages/client/src/components/hermes/models/ProviderCard.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { ref, computed } from 'vue'
-import { NButton, NCheckbox, NCheckboxGroup, NModal, useMessage, useDialog } from 'naive-ui'
+import { NButton, NCheckbox, NCheckboxGroup, NModal, NInput, useMessage, useDialog } from 'naive-ui'
 import type { AvailableModelGroup } from '@/api/hermes/system'
 import { useModelsStore } from '@/stores/hermes/models'
 import { useAppStore } from '@/stores/hermes/app'
@@ -21,6 +21,13 @@ const isCustom = computed(() => !props.provider.builtin && props.provider.provid
 const isCopilot = computed(() => props.provider.provider === 'copilot')
 const displayName = computed(() => props.provider.label)
 const deleting = ref(false)
+
+const showAliasListModal = ref(false)
+const showAliasModal = ref(false)
+const aliasProvider = ref('')
+const aliasModel = ref('')
+const aliasInput = ref('')
+
 const showVisibilityModal = ref(false)
 const visibilitySaving = ref(false)
 const selectedVisibleModels = ref<string[]>([])
@@ -31,6 +38,36 @@ const visibilityRule = computed(() => appStore.getProviderVisibility(props.provi
 const isFiltered = computed(() => visibilityRule.value.mode === 'include')
 const visibleCountLabel = computed(() => `${props.provider.models.length}/${allModels.value.length}`)
 
+function modelAlias(model: string) {
+  return appStore.getModelAlias(model, props.provider.provider)
+}
+
+function modelDisplayName(model: string) {
+  return appStore.displayModelName(model, props.provider.provider)
+}
+
+function openAliasEditor(model: string) {
+  aliasProvider.value = props.provider.provider
+  aliasModel.value = model
+  aliasInput.value = appStore.getModelAlias(model, props.provider.provider)
+  showAliasModal.value = true
+}
+
+async function saveAlias() {
+  if (!aliasModel.value || !aliasProvider.value) return
+  try {
+    await appStore.setModelAlias(aliasModel.value, aliasProvider.value, aliasInput.value)
+    showAliasModal.value = false
+  } catch (e: any) {
+    message.error(e.message || t('models.aliasSaveFailed'))
+  }
+}
+
+async function clearAlias() {
+  aliasInput.value = ''
+  await saveAlias()
+}
+
 function openVisibilityModal() {
   const rule = appStore.getProviderVisibility(props.provider.provider)
   selectedVisibleModels.value = rule.mode === 'include' ? allModels.value.filter(m => rule.models.includes(m)) : [...allModels.value]
@@ -137,11 +174,17 @@ async function handleDelete() {
         </span>
       </div>
       <div class="models-list">
-        <span
+        <button
           v-for="model in provider.models.slice(0, 20)"
           :key="model"
-          class="model-tag"
-        >{{ model }}</span>
+          class="model-tag model-tag-button"
+          type="button"
+          :title="t('models.aliasTitleFor', { model })"
+          @click="openAliasEditor(model)"
+        >
+          <span class="model-tag-name">{{ modelDisplayName(model) }}</span>
+          <span v-if="modelAlias(model)" class="model-tag-id">{{ model }}</span>
+        </button>
         <span v-if="provider.models.length > 20" class="model-tag model-tag-more">
           +{{ provider.models.length - 20 }} {{ t('models.more') }}
         </span>
@@ -149,10 +192,59 @@ async function handleDelete() {
     </div>
 
     <div class="card-actions">
+      <NButton size="tiny" quaternary @click="showAliasListModal = true">{{ t('models.aliasManage') }}</NButton>
       <NButton size="tiny" quaternary @click="openVisibilityModal">{{ t('models.manageVisibleModels') }}</NButton>
       <NButton size="tiny" quaternary type="error" :loading="deleting" @click="handleDelete">{{ t('common.delete') }}</NButton>
     </div>
 
+    <NModal
+      v-model:show="showAliasListModal"
+      preset="card"
+      :title="t('models.aliasManageFor', { provider: displayName })"
+      :style="{ width: 'min(560px, calc(100vw - 32px))' }"
+      :mask-closable="true"
+    >
+      <div class="alias-list-hint">{{ t('models.aliasHint') }}</div>
+      <div class="alias-list">
+        <div v-for="model in provider.models" :key="model" class="alias-row">
+          <div class="alias-row-text">
+            <span class="alias-row-name">{{ modelDisplayName(model) }}</span>
+            <code class="alias-row-id">{{ model }}</code>
+          </div>
+          <NButton size="tiny" quaternary @click="openAliasEditor(model)">{{ t('models.aliasEdit') }}</NButton>
+        </div>
+      </div>
+    </NModal>
+
+    <NModal
+      v-model:show="showAliasModal"
+      preset="card"
+      :title="aliasModel ? t('models.aliasTitleFor', { model: aliasModel }) : t('models.aliasTitle')"
+      :style="{ width: 'min(420px, calc(100vw - 32px))' }"
+      :mask-closable="true"
+    >
+      <NInput
+        v-model:value="aliasInput"
+        :placeholder="t('models.aliasPlaceholder')"
+        clearable
+        @keydown.enter="saveAlias"
+      />
+      <div v-if="aliasModel" class="model-alias-canonical">
+        {{ t('models.aliasCanonical', { model: aliasModel }) }}
+      </div>
+      <div class="model-alias-hint">{{ t('models.aliasHint') }}</div>
+      <template #footer>
+        <div class="model-alias-actions">
+          <NButton quaternary :disabled="!appStore.getModelAlias(aliasModel, aliasProvider)" @click="clearAlias">
+            {{ t('models.aliasUseOriginal') }}
+          </NButton>
+          <div class="model-alias-spacer" />
+          <NButton @click="showAliasModal = false">{{ t('common.cancel') }}</NButton>
+          <NButton type="primary" @click="saveAlias">{{ t('common.save') }}</NButton>
+        </div>
+      </template>
+    </NModal>
+
     <NModal
       v-model:show="showVisibilityModal"
       preset="card"
@@ -172,7 +264,8 @@ async function handleDelete() {
             :value="model"
             class="visibility-model"
           >
-            <code>{{ model }}</code>
+            <code>{{ modelDisplayName(model) }}</code>
+            <code v-if="modelAlias(model)" class="visibility-model-id">{{ model }}</code>
           </NCheckbox>
         </NCheckboxGroup>
       </div>
@@ -291,7 +384,8 @@ async function handleDelete() {
 .model-tag {
   display: inline-flex;
   align-items: center;
-  height: 20px;
+  gap: 5px;
+  min-height: 22px;
   font-size: 10px;
   font-family: $font-code;
   padding: 2px 6px;
@@ -299,7 +393,7 @@ async function handleDelete() {
   background: rgba(var(--accent-primary-rgb), 0.08);
   color: $text-secondary;
   white-space: nowrap;
-  max-width: 200px;
+  max-width: 260px;
   overflow: hidden;
   text-overflow: ellipsis;
 
@@ -310,6 +404,28 @@ async function handleDelete() {
   }
 }
 
+.model-tag-button {
+  border: 0;
+  cursor: pointer;
+  text-align: left;
+
+  &:hover {
+    background: rgba(var(--accent-primary-rgb), 0.16);
+    color: $text-primary;
+  }
+}
+
+.model-tag-name,
+.model-tag-id {
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.model-tag-id {
+  color: $text-muted;
+  font-size: 9px;
+}
+
 .card-actions {
   display: flex;
   gap: 8px;
@@ -317,6 +433,78 @@ async function handleDelete() {
   padding-top: 10px;
 }
 
+.alias-list-hint,
+.model-alias-hint {
+  color: $text-muted;
+  font-size: 12px;
+}
+
+.alias-list-hint {
+  margin-bottom: 12px;
+}
+
+.alias-list {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  max-height: 45vh;
+  overflow-y: auto;
+}
+
+.alias-row {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 8px;
+  border: 1px solid $border-light;
+  border-radius: $radius-sm;
+}
+
+.alias-row-text {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.alias-row-name {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: $text-primary;
+  font-family: $font-code;
+  font-size: 12px;
+}
+
+.alias-row-id,
+.model-alias-canonical {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: $text-muted;
+  font-family: $font-code;
+  font-size: 11px;
+}
+
+.model-alias-canonical {
+  margin-top: 8px;
+}
+
+.model-alias-hint {
+  margin-top: 6px;
+}
+
+.model-alias-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.model-alias-spacer {
+  flex: 1;
+}
+
 .visibility-hint {
   margin: 0 0 10px;
   color: $text-secondary;
@@ -350,6 +538,12 @@ async function handleDelete() {
   }
 }
 
+.visibility-model-id {
+  margin-left: 6px;
+  color: $text-muted !important;
+  font-size: 11px !important;
+}
+
 .visibility-actions {
   display: flex;
   align-items: center;
diff --git a/packages/client/src/components/layout/ModelSelector.vue b/packages/client/src/components/layout/ModelSelector.vue
index 45c60d0f..7d456da7 100644
--- a/packages/client/src/components/layout/ModelSelector.vue
+++ b/packages/client/src/components/layout/ModelSelector.vue
@@ -13,6 +13,8 @@ const collapsedGroups = ref<Record<string, boolean>>({})
 const customInput = ref('')
 const customProvider = ref('')
 
+const selectedDisplayName = computed(() => appStore.displayModelName(appStore.selectedModel, appStore.selectedProvider))
+
 const providerOptions = computed(() => {
   const current = appStore.selectedProvider
   customProvider.value = current
@@ -29,13 +31,13 @@ const modelGroupsWithCustom = computed(() =>
   }))
 )
 
-const customModelSet = computed(() => {
-  const set = new Set<string>()
-  for (const models of Object.values(appStore.customModels)) {
-    models.forEach(m => set.add(m))
-  }
-  return set
-})
+function isCustomModel(model: string, provider: string) {
+  return (appStore.customModels[provider] || []).includes(model)
+}
+
+async function removeCustomModel(model: string, provider: string) {
+  await appStore.removeCustomModel(model, provider)
+}
 
 const filteredGroups = computed(() => {
   const q = searchQuery.value.toLowerCase().trim()
@@ -43,7 +45,10 @@ const filteredGroups = computed(() => {
   return modelGroupsWithCustom.value
     .map(g => ({
       ...g,
-      models: g.models.filter(m => m.toLowerCase().includes(q)),
+      models: g.models.filter(m => {
+        const displayName = appStore.displayModelName(m, g.provider)
+        return m.toLowerCase().includes(q) || displayName.toLowerCase().includes(q)
+      }),
     }))
     .filter(g => g.models.length > 0 || g.label.toLowerCase().includes(q))
 })
@@ -64,6 +69,14 @@ function handleSelect(model: string, provider: string) {
   searchQuery.value = ''
 }
 
+function modelDisplayName(model: string, provider: string) {
+  return appStore.displayModelName(model, provider)
+}
+
+function modelAlias(model: string, provider: string) {
+  return appStore.getModelAlias(model, provider)
+}
+
 function handleCustomSubmit() {
   const model = customInput.value.trim()
   if (!model || !customProvider.value) return
@@ -89,7 +102,7 @@ function openModal() {
   <div class="model-selector">
     <div class="model-label">{{ t('models.title') }}</div>
     <button class="model-trigger" @click="openModal">
-      <span class="model-name" :title="appStore.selectedModel">{{ appStore.selectedModel || '—' }}</span>
+      <span class="model-name" :title="appStore.selectedModel">{{ selectedDisplayName || '—' }}</span>
       <svg class="model-arrow" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
         <polyline points="6 9 12 15 18 9" />
       </svg>
@@ -134,10 +147,24 @@ function openModal() {
               :title="group.model_meta?.[model]?.disabled ? t('models.disabledTooltip') : ''"
               @click="handleSelect(model, group.provider)"
             >
-              <span class="model-item-name">{{ model }}</span>
+              <span class="model-item-label">
+                <span class="model-item-name">{{ modelDisplayName(model, group.provider) }}</span>
+                <span v-if="modelAlias(model, group.provider)" class="model-item-id">
+                  {{ t('models.aliasCanonical', { model }) }}
+                </span>
+              </span>
               <span v-if="group.model_meta?.[model]?.preview" class="model-badge-preview">{{ t('models.previewBadge') }}</span>
               <span v-if="group.model_meta?.[model]?.disabled" class="model-badge-disabled">{{ t('models.disabledBadge') }}</span>
-              <span v-if="customModelSet.has(model)" class="model-badge-custom">{{ t('models.customBadge') }}</span>
+              <span v-if="isCustomModel(model, group.provider)" class="model-badge-custom">{{ t('models.customBadge') }}</span>
+              <button
+                v-if="isCustomModel(model, group.provider)"
+                class="model-custom-remove"
+                type="button"
+                :title="t('models.removeCustomModel')"
+                @click.stop="removeCustomModel(model, group.provider)"
+              >
+                ×
+              </button>
               <svg v-if="model === appStore.selectedModel && group.provider === appStore.selectedProvider" class="model-check" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
                 <polyline points="20 6 9 17 4 12" />
               </svg>
@@ -169,6 +196,7 @@ function openModal() {
         </div>
       </div>
     </NModal>
+
   </div>
 </template>
 
@@ -308,8 +336,15 @@ function openModal() {
   }
 }
 
-.model-item-name {
+.model-item-label {
   flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.model-item-name {
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
@@ -317,6 +352,17 @@ function openModal() {
   font-size: 12px;
 }
 
+.model-item-id {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: $text-muted;
+  font-family: $font-code;
+  font-size: 10px;
+  font-weight: 400;
+}
+
+
 .model-check {
   flex-shrink: 0;
   color: $accent-primary;
@@ -334,6 +380,25 @@ function openModal() {
   letter-spacing: 0.03em;
 }
 
+
+.model-custom-remove {
+  flex-shrink: 0;
+  width: 18px;
+  height: 18px;
+  border: 0;
+  border-radius: 50%;
+  background: transparent;
+  color: $text-muted;
+  cursor: pointer;
+  line-height: 18px;
+  padding: 0;
+
+  &:hover {
+    background: rgba(var(--error-rgb), 0.12);
+    color: $error;
+  }
+}
+
 .model-badge-preview {
   flex-shrink: 0;
   font-size: 9px;
diff --git a/packages/client/src/i18n/locales/de.ts b/packages/client/src/i18n/locales/de.ts
index 0f250af9..a4ad438c 100644
--- a/packages/client/src/i18n/locales/de.ts
+++ b/packages/client/src/i18n/locales/de.ts
@@ -419,8 +419,8 @@ jobTriggered: 'Job ausgelost',
     previewBadge: 'VORSCHAU',
     disabledBadge: 'NICHT VERFÜGBAR',
     disabledTooltip: "Dieses Modell ist für Ihr Konto derzeit nicht verfügbar.",
-    customModelPlaceholder: 'Benutzerdefinierter Modellname',
-    customModelHint: 'Enter zum Laden',
+    customModelPlaceholder: 'Nicht gelistete Modell-ID',
+    customModelHint: 'Für vom Provider unterstützte Modelle, die die API nicht zurückgibt; keine Anzeige-Umbenennung. Enter zum Laden.',
     noProviders: 'Keine Anbieter gefunden. Fugen Sie einen benutzerdefinierten Anbieter hinzu, um zu beginnen.',
     builtIn: 'Integriert',
     customType: 'Benutzerdefiniert',
diff --git a/packages/client/src/i18n/locales/en.ts b/packages/client/src/i18n/locales/en.ts
index 146f660f..67b26e82 100644
--- a/packages/client/src/i18n/locales/en.ts
+++ b/packages/client/src/i18n/locales/en.ts
@@ -547,12 +547,23 @@ export default {
     previewBadge: 'PREVIEW',
     disabledBadge: 'UNAVAILABLE',
     disabledTooltip: "This model is currently unavailable for your account.",
-    customModelPlaceholder: 'Custom model name',
-    customModelHint: 'Enter to load',
+    customModelPlaceholder: 'Unlisted model ID',
+    customModelHint: 'For provider-supported models not returned by the API; not a display rename. Press Enter to load.',
+    removeCustomModel: 'Remove this unlisted model',
     noProviders: 'No providers found. Add a custom provider to get started.',
     models: 'Models',
     count: 'models',
     more: 'more',
+    aliasEdit: 'Rename',
+    aliasTitle: 'Model display name',
+    aliasTitleFor: 'Display name for {model}',
+    aliasPlaceholder: 'Leave empty to use original model ID',
+    aliasHint: 'Display-only alias. Hermes still receives the canonical model ID.',
+    aliasCanonical: 'Original ID: {model}',
+    aliasUseOriginal: 'Use original ID',
+    aliasManage: 'Display names',
+    aliasManageFor: 'Display names for {provider}',
+    aliasSaveFailed: 'Failed to save display name',
     manageVisibleModels: 'Manage visible models',
     manageVisibleModelsFor: 'Manage visible models for {name}',
     visibilityHint: 'Only affects the Web UI model picker and Models page. Hermes CLI provider/model config is not rewritten; calls still use canonical model IDs.',
diff --git a/packages/client/src/i18n/locales/es.ts b/packages/client/src/i18n/locales/es.ts
index 6e9e367b..e62011b1 100644
--- a/packages/client/src/i18n/locales/es.ts
+++ b/packages/client/src/i18n/locales/es.ts
@@ -419,8 +419,8 @@ jobTriggered: 'Job ejecutado',
     previewBadge: 'VISTA PREVIA',
     disabledBadge: 'NO DISPONIBLE',
     disabledTooltip: "Este modelo no está disponible para tu cuenta.",
-    customModelPlaceholder: 'Nombre del modelo personalizado',
-    customModelHint: 'Enter para cargar',
+    customModelPlaceholder: 'ID de modelo no listado',
+    customModelHint: 'Para modelos compatibles con el proveedor que la API no devuelve; no es un cambio de nombre visible. Enter para cargar.',
     noProviders: 'No se encontraron proveedores. Anade un proveedor personalizado para comenzar.',
     builtIn: 'Integrado',
     customType: 'Personalizado',
diff --git a/packages/client/src/i18n/locales/fr.ts b/packages/client/src/i18n/locales/fr.ts
index fc4d4fba..2c5927b6 100644
--- a/packages/client/src/i18n/locales/fr.ts
+++ b/packages/client/src/i18n/locales/fr.ts
@@ -419,8 +419,8 @@ jobTriggered: 'Job declenche',
     previewBadge: 'APERÇU',
     disabledBadge: 'INDISPONIBLE',
     disabledTooltip: "Ce modèle n'est pas disponible pour votre compte.",
-    customModelPlaceholder: 'Nom du modèle personnalisé',
-    customModelHint: 'Entrée pour charger',
+    customModelPlaceholder: 'ID de modèle non listé',
+    customModelHint: 'Pour les modèles pris en charge par le fournisseur mais non renvoyés par l’API ; ce n’est pas un renommage affiché. Entrée pour charger.',
     noProviders: 'Aucun fournisseur trouve. Ajoutez un fournisseur personnalise pour commencer.',
     builtIn: 'Integre',
     customType: 'Personnalise',
diff --git a/packages/client/src/i18n/locales/ja.ts b/packages/client/src/i18n/locales/ja.ts
index 0cedd706..92f8bd88 100644
--- a/packages/client/src/i18n/locales/ja.ts
+++ b/packages/client/src/i18n/locales/ja.ts
@@ -419,8 +419,8 @@ export default {
     previewBadge: 'プレビュー',
     disabledBadge: '利用不可',
     disabledTooltip: "このモデルは現在のアカウントでは利用できません。",
-    customModelPlaceholder: 'カスタムモデル名',
-    customModelHint: 'Enterで読み込み',
+    customModelPlaceholder: '未掲載のモデル ID',
+    customModelHint: 'プロバイダーは対応しているが API が返さないモデル用です。表示名の変更ではありません。Enter で読み込み。',
     noProviders: 'プロバイダーがありません。カスタムプロバイダーを追加して始めましょう。',
     builtIn: '組み込み',
     customType: 'カスタム',
diff --git a/packages/client/src/i18n/locales/ko.ts b/packages/client/src/i18n/locales/ko.ts
index 94347268..e8918233 100644
--- a/packages/client/src/i18n/locales/ko.ts
+++ b/packages/client/src/i18n/locales/ko.ts
@@ -419,8 +419,8 @@ export default {
     previewBadge: '프리뷰',
     disabledBadge: '사용 불가',
     disabledTooltip: "이 모델은 현재 계정에서 사용할 수 없습니다.",
-    customModelPlaceholder: '사용자 지정 모델 이름',
-    customModelHint: 'Enter로 불러오기',
+    customModelPlaceholder: '목록에 없는 모델 ID',
+    customModelHint: '제공자는 지원하지만 API가 반환하지 않는 모델용입니다. 표시 이름 변경이 아닙니다. Enter로 불러옵니다.',
     noProviders: 'Provider가 없습니다. 사용자 지정 Provider를 추가하여 시작하세요.',
     builtIn: '내장',
     customType: '사용자 지정',
diff --git a/packages/client/src/i18n/locales/pt.ts b/packages/client/src/i18n/locales/pt.ts
index 419e83ab..4e32d7a0 100644
--- a/packages/client/src/i18n/locales/pt.ts
+++ b/packages/client/src/i18n/locales/pt.ts
@@ -419,8 +419,8 @@ jobTriggered: 'Job acionado',
     previewBadge: 'PRÉVIA',
     disabledBadge: 'INDISPONÍVEL',
     disabledTooltip: "Este modelo não está disponível para sua conta.",
-    customModelPlaceholder: 'Nome do modelo personalizado',
-    customModelHint: 'Enter para carregar',
+    customModelPlaceholder: 'ID de modelo não listado',
+    customModelHint: 'Para modelos compatíveis com o provedor que a API não retorna; não é uma renomeação de exibição. Enter para carregar.',
     noProviders: 'Nenhum provedor encontrado. Adicione um provedor personalizado para comecar.',
     builtIn: 'Integrado',
     customType: 'Personalizado',
diff --git a/packages/client/src/i18n/locales/zh.ts b/packages/client/src/i18n/locales/zh.ts
index 156c5a02..4c32bf7a 100644
--- a/packages/client/src/i18n/locales/zh.ts
+++ b/packages/client/src/i18n/locales/zh.ts
@@ -547,12 +547,23 @@ export default {
     previewBadge: '预览',
     disabledBadge: '不可用',
     disabledTooltip: "此模型当前账号不可用",
-    customModelPlaceholder: '自定义模型名称',
-    customModelHint: '按回车加载',
+    customModelPlaceholder: '未列出的模型 ID',
+    customModelHint: '仅用于 provider 支持但未返回的模型；不是重命名。按回车加载。',
+    removeCustomModel: '移除这个未列出的模型',
     noProviders: '暂无 Provider，添加一个开始吧。',
     models: '模型列表',
     count: '个模型',
     more: '个更多',
+    aliasEdit: '重命名',
+    aliasTitle: '模型显示名',
+    aliasTitleFor: '{model} 的显示名',
+    aliasPlaceholder: '留空则使用原始模型 ID',
+    aliasHint: '仅修改 Web UI 显示名，发送给 Hermes 的仍是原始模型 ID。',
+    aliasCanonical: '原始 ID：{model}',
+    aliasUseOriginal: '恢复原始 ID',
+    aliasManage: '显示名',
+    aliasManageFor: '{provider} 的显示名',
+    aliasSaveFailed: '保存显示名失败',
     manageVisibleModels: '管理可见模型',
     manageVisibleModelsFor: '管理 {name} 可见模型',
     visibilityHint: '仅影响 Web UI 的模型选择器和模型页展示，不会改写 Hermes CLI 的 provider/model 配置。实际调用仍使用原始模型 ID。',
diff --git a/packages/client/src/stores/hermes/app.ts b/packages/client/src/stores/hermes/app.ts
index cb28ebbc..38c3395f 100644
--- a/packages/client/src/stores/hermes/app.ts
+++ b/packages/client/src/stores/hermes/app.ts
@@ -1,6 +1,17 @@
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
-import { checkHealth, fetchAvailableModels, updateDefaultModel, updateModelVisibility, triggerUpdate, type AvailableModelGroup, type AvailableModelsResponse, type ModelVisibility, type ModelVisibilityRule } from '@/api/hermes/system'
+import {
+  checkHealth,
+  fetchAvailableModels,
+  updateDefaultModel,
+  updateModelVisibility,
+  triggerUpdate,
+  updateModelAlias,
+  type AvailableModelGroup,
+  type AvailableModelsResponse,
+  type ModelVisibility,
+  type ModelVisibilityRule,
+} from '@/api/hermes/system'
 
 const WEB_UI_VERSION = __APP_VERSION__
 
@@ -20,6 +31,7 @@ export const useAppStore = defineStore('app', () => {
   const selectedModel = ref('')
   const selectedProvider = ref('')
   const customModels = ref<Record<string, string[]>>({})
+  const modelAliases = ref<Record<string, Record<string, string>>>({})
   const modelVisibility = ref<ModelVisibility>({})
   const healthPollTimer = ref<ReturnType<typeof setInterval>>()
   const nodeVersion = ref('')
@@ -61,13 +73,55 @@ export const useAppStore = defineStore('app', () => {
 
   function applyAvailableModelsResponse(res: AvailableModelsResponse) {
     modelGroups.value = res.groups
+    modelAliases.value = res.model_aliases || {}
     modelVisibility.value = res.model_visibility || {}
-    const defaultGroup = res.groups.find(g => g.provider === (res.default_provider || '') && g.models.includes(res.default))
-    const inferredGroup = res.groups.find(g => g.models.includes(res.default))
+
+    const defaultModel = res.default || ''
+    const defaultProvider = res.default_provider || ''
+    const explicitGroup = res.groups.find(g => g.provider === defaultProvider && g.models.includes(defaultModel))
+    const inferredGroup = res.groups.find(g => g.models.includes(defaultModel))
     const fallbackGroup = res.groups.find(g => g.models.length > 0)
-    const selectedGroup = defaultGroup || inferredGroup || fallbackGroup
-    selectedModel.value = selectedGroup ? (defaultGroup || inferredGroup ? res.default : selectedGroup.models[0]) : ''
-    selectedProvider.value = selectedGroup?.provider || ''
+
+    const providerGroup = defaultProvider ? res.groups.find(g => g.provider === defaultProvider) : undefined
+    const allProvider = defaultProvider ? res.allProviders.find(g => g.provider === defaultProvider) : undefined
+    const providerCatalog = providerGroup?.available_models?.length
+      ? providerGroup.available_models
+      : allProvider?.available_models?.length
+        ? allProvider.available_models
+        : allProvider?.models || []
+    const visibilityRule = defaultProvider ? modelVisibility.value[defaultProvider] : undefined
+    const hiddenByVisibility = !!(
+      defaultModel &&
+      visibilityRule?.mode === 'include' &&
+      !visibilityRule.models.includes(defaultModel) &&
+      (providerCatalog.length === 0 || providerCatalog.includes(defaultModel))
+    )
+    const unlistedDefault = !!(
+      defaultModel &&
+      defaultProvider &&
+      providerGroup &&
+      !providerGroup.models.includes(defaultModel) &&
+      !hiddenByVisibility
+    )
+
+    if (explicitGroup || inferredGroup) {
+      const selectedGroup = explicitGroup || inferredGroup!
+      selectedModel.value = defaultModel
+      selectedProvider.value = selectedGroup.provider
+      customModels.value = {}
+    } else if (unlistedDefault) {
+      selectedModel.value = defaultModel
+      selectedProvider.value = defaultProvider
+      customModels.value = { [defaultProvider]: [defaultModel] }
+    } else if (fallbackGroup) {
+      selectedModel.value = fallbackGroup.models[0]
+      selectedProvider.value = fallbackGroup.provider
+      customModels.value = {}
+    } else {
+      selectedModel.value = ''
+      selectedProvider.value = ''
+      customModels.value = {}
+    }
   }
 
   async function loadModels() {
@@ -79,6 +133,34 @@ export const useAppStore = defineStore('app', () => {
     }
   }
 
+  function getModelAlias(modelId: string, provider?: string): string {
+    if (provider) return modelAliases.value[provider]?.[modelId] || ''
+    for (const aliases of Object.values(modelAliases.value)) {
+      if (aliases[modelId]) return aliases[modelId]
+    }
+    return ''
+  }
+
+  function displayModelName(modelId: string, provider?: string): string {
+    return getModelAlias(modelId, provider) || modelId
+  }
+
+  async function setModelAlias(modelId: string, provider: string, alias: string) {
+    const cleanAlias = alias.trim()
+    await updateModelAlias({ provider, model: modelId, alias: cleanAlias })
+    const next = { ...modelAliases.value }
+    const providerAliases = { ...(next[provider] || {}) }
+    if (cleanAlias) {
+      providerAliases[modelId] = cleanAlias
+      next[provider] = providerAliases
+    } else {
+      delete providerAliases[modelId]
+      if (Object.keys(providerAliases).length > 0) next[provider] = providerAliases
+      else delete next[provider]
+    }
+    modelAliases.value = next
+  }
+
   async function switchModel(modelId: string, providerOverride?: string) {
     try {
       // Find the group containing this model to get provider info
@@ -99,6 +181,27 @@ export const useAppStore = defineStore('app', () => {
     }
   }
 
+  async function removeCustomModel(modelId: string, provider: string) {
+    const providerModels = customModels.value[provider] || []
+    if (!providerModels.includes(modelId)) return
+
+    const nextCustomModels = { ...customModels.value }
+    const remaining = providerModels.filter(m => m !== modelId)
+    if (remaining.length > 0) nextCustomModels[provider] = remaining
+    else delete nextCustomModels[provider]
+    customModels.value = nextCustomModels
+
+    if (selectedModel.value === modelId && selectedProvider.value === provider) {
+      const providerGroup = modelGroups.value.find(g => g.provider === provider && g.models.length > 0)
+      const fallbackGroup = providerGroup || modelGroups.value.find(g => g.models.length > 0)
+      if (fallbackGroup) {
+        await switchModel(fallbackGroup.models[0], fallbackGroup.provider)
+      } else {
+        selectedModel.value = ''
+        selectedProvider.value = ''
+      }
+    }
+  }
 
   function getProviderVisibility(provider: string): ModelVisibilityRule {
     return modelVisibility.value[provider] || { mode: 'all', models: [] }
@@ -160,6 +263,7 @@ export const useAppStore = defineStore('app', () => {
     doUpdate,
     modelGroups,
     customModels,
+    modelAliases,
     modelVisibility,
     selectedModel,
     selectedProvider,
@@ -170,6 +274,10 @@ export const useAppStore = defineStore('app', () => {
     loadModels,
     applyAvailableModelsResponse,
     switchModel,
+    removeCustomModel,
+    getModelAlias,
+    displayModelName,
+    setModelAlias,
     getProviderVisibility,
     isModelVisible,
     setModelVisibility,
diff --git a/packages/client/src/views/hermes/ModelsView.vue b/packages/client/src/views/hermes/ModelsView.vue
index e335b31c..caae2d2c 100644
--- a/packages/client/src/views/hermes/ModelsView.vue
+++ b/packages/client/src/views/hermes/ModelsView.vue
@@ -15,9 +15,9 @@ const showModal = ref(false)
 
 onMounted(async () => {
   // 先 invalidate 后端 copilot 缓存（gh logout / VS Code 退出后下一次 list 立刻反映），
-  // 再拉 providers。check-token 失败不阻断。
+  // 再拉 providers 与 appStore 的模型显示名配置。check-token 失败不阻断。
   try { await checkCopilotToken() } catch { /* ignore */ }
-  modelsStore.fetchProviders()
+  await Promise.all([modelsStore.fetchProviders(), appStore.loadModels()])
 })
 
 function openCreateModal() {
diff --git a/packages/server/src/controllers/hermes/models.ts b/packages/server/src/controllers/hermes/models.ts
index 4b2231e7..e93c3ecd 100644
--- a/packages/server/src/controllers/hermes/models.ts
+++ b/packages/server/src/controllers/hermes/models.ts
@@ -10,10 +10,57 @@ import { MODEL_CONTEXT_TABLE } from '../../db/hermes/schemas'
 
 const PROVIDER_MODEL_CATALOG = buildProviderModelMap()
 
-type ModelMeta = { preview?: boolean; disabled?: boolean }
+type ModelMeta = { preview?: boolean; disabled?: boolean; alias?: string }
 type AvailableGroup = { provider: string; label: string; base_url: string; models: string[]; api_key: string; builtin?: boolean; model_meta?: Record<string, ModelMeta>; available_models?: string[] }
 type ModelVisibility = Record<string, ModelVisibilityRule>
 
+const RESERVED_ALIAS_KEYS = new Set(['__proto__', 'prototype', 'constructor'])
+
+function isSafeAliasKey(value: string): boolean {
+  const trimmed = value.trim()
+  return !!trimmed && trimmed.length <= 512 && !RESERVED_ALIAS_KEYS.has(trimmed)
+}
+
+function createAliasMap(): Record<string, string> {
+  return Object.create(null) as Record<string, string>
+}
+
+function createProviderAliasMap(): Record<string, Record<string, string>> {
+  return Object.create(null) as Record<string, Record<string, string>>
+}
+
+function normalizeAliases(value: unknown): Record<string, Record<string, string>> {
+  const normalized = createProviderAliasMap()
+  if (!value || typeof value !== 'object' || Array.isArray(value)) return normalized
+  for (const [provider, models] of Object.entries(value as Record<string, unknown>)) {
+    if (!isSafeAliasKey(provider) || !models || typeof models !== 'object' || Array.isArray(models)) continue
+    for (const [model, alias] of Object.entries(models as Record<string, unknown>)) {
+      if (!isSafeAliasKey(model) || typeof alias !== 'string') continue
+      const trimmed = alias.trim()
+      if (!trimmed || trimmed.length > 512) continue
+      if (!Object.hasOwn(normalized, provider)) normalized[provider] = createAliasMap()
+      normalized[provider][model] = trimmed
+    }
+  }
+  return normalized
+}
+
+function applyModelAliases<T extends { provider: string; models: string[]; model_meta?: Record<string, ModelMeta> }>(groups: T[], aliases: Record<string, Record<string, string>>): T[] {
+  return groups.map((group) => {
+    const providerAliases = aliases[group.provider]
+    if (!providerAliases) return group
+    const modelMeta: Record<string, ModelMeta> = { ...(group.model_meta || {}) }
+    let changed = false
+    for (const model of group.models) {
+      const alias = providerAliases[model]
+      if (!alias) continue
+      modelMeta[model] = { ...(modelMeta[model] || {}), alias }
+      changed = true
+    }
+    return changed ? { ...group, model_meta: modelMeta } : group
+  })
+}
+
 function uniqueStrings(values: unknown): string[] {
   if (!Array.isArray(values)) return []
   return Array.from(new Set(values.map(v => String(v || '').trim()).filter(Boolean)))
@@ -158,6 +205,7 @@ export async function getAvailable(ctx: any) {
     // 时也不返回。避免误把 VS Code/gh CLI 用户的全局凭证当作 hermes provider。
     const appConfig = await readAppConfig()
     const copilotEnabled = appConfig.copilotEnabled === true
+    const modelAliases = normalizeAliases(appConfig.modelAliases)
     const modelVisibility = normalizeModelVisibility(appConfig.modelVisibility)
 
     // 兼容老用户：上一版本会"自动 fallback discovery"出 Copilot；升级后这些用户的
@@ -186,7 +234,7 @@ export async function getAvailable(ctx: any) {
       }
       const catalogModels = PROVIDER_MODEL_CATALOG[providerKey]
       let modelsList: string[] = catalogModels && catalogModels.length > 0 ? [...catalogModels] : []
-      let modelMeta: Record<string, { preview?: boolean; disabled?: boolean }> | undefined
+      let modelMeta: Record<string, ModelMeta> | undefined
       if (providerKey === 'copilot') {
         const live = await getCopilotLive()
         if (live.length > 0) {
@@ -250,7 +298,8 @@ export async function getAvailable(ctx: any) {
     }
 
     for (const g of groups) { g.models = Array.from(new Set(g.models)) }
-    const visibleGroups = applyModelVisibility(groups, modelVisibility)
+    const groupsWithAliases = applyModelAliases(groups, modelAliases)
+    const visibleGroups = applyModelVisibility(groupsWithAliases, modelVisibility)
     const visibleDefault = resolveVisibleDefault(currentDefault, currentDefaultProvider, visibleGroups)
 
     // 动态拉一次 copilot 模型用于 allProviders 展示（同一请求复用缓存）
@@ -264,6 +313,7 @@ export async function getAvailable(ctx: any) {
       base_url: p.base_url,
       models: p.value === 'copilot' && liveCopilotIds.length > 0 ? liveCopilotIds : p.models,
     }))
+    const allProviders = applyModelAliases(allProvidersBase, modelAliases)
 
     if (groups.length === 0) {
       const fallback = buildModelGroups(config)
@@ -278,13 +328,15 @@ export async function getAvailable(ctx: any) {
           api_key: '',
         }
       })
-      const visibleFallbackGroups = applyModelVisibility(fallbackGroups, modelVisibility)
+      const fallbackGroupsWithAliases = applyModelAliases(fallbackGroups, modelAliases)
+      const visibleFallbackGroups = applyModelVisibility(fallbackGroupsWithAliases, modelVisibility)
       const fallbackDefault = resolveVisibleDefault(fallback.default, currentDefaultProvider, visibleFallbackGroups)
       ctx.body = {
         default: fallbackDefault.defaultModel,
         default_provider: fallbackDefault.defaultProvider,
         groups: visibleFallbackGroups,
-        allProviders: allProvidersBase,
+        allProviders,
+        model_aliases: modelAliases,
         model_visibility: modelVisibility,
       }
       return
@@ -294,7 +346,8 @@ export async function getAvailable(ctx: any) {
       default: visibleDefault.defaultModel,
       default_provider: visibleDefault.defaultProvider,
       groups: visibleGroups,
-      allProviders: allProvidersBase,
+      allProviders,
+      model_aliases: modelAliases,
       model_visibility: modelVisibility,
     }
   } catch (err: any) {
@@ -303,6 +356,55 @@ export async function getAvailable(ctx: any) {
   }
 }
 
+
+export async function setModelAlias(ctx: any) {
+  const body = ctx.request.body
+  const provider = body && typeof body === 'object' && !Array.isArray(body) ? body.provider : undefined
+  const model = body && typeof body === 'object' && !Array.isArray(body) ? body.model : undefined
+  const alias = body && typeof body === 'object' && !Array.isArray(body) ? body.alias : undefined
+
+  if (typeof provider !== 'string' || typeof model !== 'string' || (alias !== undefined && typeof alias !== 'string')) {
+    ctx.status = 400
+    ctx.body = { error: 'Invalid provider, model, or alias' }
+    return
+  }
+
+  const cleanProvider = provider.trim()
+  const cleanModel = model.trim()
+  const cleanAlias = (alias || '').trim()
+
+  if (!isSafeAliasKey(cleanProvider) || !isSafeAliasKey(cleanModel)) {
+    ctx.status = 400
+    ctx.body = { error: 'Invalid provider or model' }
+    return
+  }
+
+  if (cleanAlias.length > 512) {
+    ctx.status = 400
+    ctx.body = { error: 'Alias is too long' }
+    return
+  }
+
+  try {
+    const appConfig = await readAppConfig()
+    const modelAliases = normalizeAliases(appConfig.modelAliases)
+    if (cleanAlias) {
+      if (!Object.hasOwn(modelAliases, cleanProvider)) modelAliases[cleanProvider] = createAliasMap()
+      modelAliases[cleanProvider][cleanModel] = cleanAlias
+    } else {
+      if (Object.hasOwn(modelAliases, cleanProvider)) delete modelAliases[cleanProvider][cleanModel]
+      if (Object.hasOwn(modelAliases, cleanProvider) && Object.keys(modelAliases[cleanProvider]).length === 0) {
+        delete modelAliases[cleanProvider]
+      }
+    }
+    await writeAppConfig({ modelAliases })
+    ctx.body = { success: true, model_aliases: modelAliases }
+  } catch (err: any) {
+    ctx.status = 500
+    ctx.body = { error: err.message }
+  }
+}
+
 export async function getConfigModels(ctx: any) {
   try {
     const config = await readConfigYaml()
diff --git a/packages/server/src/routes/hermes/models.ts b/packages/server/src/routes/hermes/models.ts
index 2d10734a..d55953f4 100644
--- a/packages/server/src/routes/hermes/models.ts
+++ b/packages/server/src/routes/hermes/models.ts
@@ -6,6 +6,7 @@ export const modelRoutes = new Router()
 modelRoutes.get('/api/hermes/available-models', ctrl.getAvailable)
 modelRoutes.get('/api/hermes/config/models', ctrl.getConfigModels)
 modelRoutes.put('/api/hermes/config/model', ctrl.setConfigModel)
+modelRoutes.put('/api/hermes/model-alias', ctrl.setModelAlias)
 modelRoutes.put('/api/hermes/model-visibility', ctrl.setModelVisibility)
 
 // Model context routes
diff --git a/packages/server/src/services/app-config.ts b/packages/server/src/services/app-config.ts
index 35d3ea28..20a0efc0 100644
--- a/packages/server/src/services/app-config.ts
+++ b/packages/server/src/services/app-config.ts
@@ -18,6 +18,10 @@ export interface AppConfig {
   // owns the provider list, system credentials are merely a fallback source.
   copilotEnabled?: boolean
 
+  // Web UI-only model display aliases. Keys are provider -> canonical model ID -> display label.
+  // These aliases never replace the canonical model ID sent back to Hermes.
+  modelAliases?: Record<string, Record<string, string>>
+
   // Web UI-only model picker visibility. This filters what the WUI exposes in
   // its sidebar/model pages and never renames or rewrites Hermes canonical
   // provider/model IDs. Hermes CLI config remains the upstream source of truth.
diff --git a/packages/server/src/services/hermes/plugins.ts b/packages/server/src/services/hermes/plugins.ts
index dcec4e8a..96e714e8 100644
--- a/packages/server/src/services/hermes/plugins.ts
+++ b/packages/server/src/services/hermes/plugins.ts
@@ -256,7 +256,7 @@ function resolveHermesAgentRoot(): string {
     '/opt/hermes',
     join(homedir(), '.hermes', 'hermes-agent'),     // Unix/Linux/macOS
   ]
- 
+
   // Windows specific path
   if (process.platform === 'win32' && process.env.LOCALAPPDATA) {
     candidates.push(join(process.env.LOCALAPPDATA, 'hermes', 'hermes-agent'))
diff --git a/tests/client/app-store.test.ts b/tests/client/app-store.test.ts
index 89423122..fc43f9fd 100644
--- a/tests/client/app-store.test.ts
+++ b/tests/client/app-store.test.ts
@@ -6,6 +6,7 @@ const mockSystemApi = vi.hoisted(() => ({
   checkHealth: vi.fn(),
   fetchAvailableModels: vi.fn(),
   updateDefaultModel: vi.fn(),
+  updateModelAlias: vi.fn(),
   updateModelVisibility: vi.fn(),
   triggerUpdate: vi.fn(),
 }))
@@ -35,8 +36,6 @@ describe('App Store', () => {
     expect(window.localStorage.getItem('hermes_sidebar_collapsed')).toBe('0')
   })
 
-
-
   it('loads model visibility and falls back when the configured default is hidden', async () => {
     mockSystemApi.fetchAvailableModels.mockResolvedValue({
       default: 'deepseek-chat',
@@ -64,10 +63,57 @@ describe('App Store', () => {
     })
     expect(store.selectedModel).toBe('deepseek-reasoner')
     expect(store.selectedProvider).toBe('deepseek')
+    expect(store.customModels).toEqual({})
     expect(store.isModelVisible('deepseek', 'deepseek-reasoner')).toBe(true)
     expect(store.isModelVisible('deepseek', 'deepseek-chat')).toBe(false)
   })
 
+  it('loads aliases while falling back from a hidden default without rehydrating it as custom', async () => {
+    mockSystemApi.fetchAvailableModels.mockResolvedValue({
+      default: 'deepseek-chat',
+      default_provider: 'deepseek',
+      groups: [
+        {
+          provider: 'deepseek',
+          label: 'DeepSeek',
+          base_url: 'https://api.deepseek.com/v1',
+          api_key: 'sk-test',
+          models: ['deepseek-reasoner'],
+          available_models: ['deepseek-chat', 'deepseek-reasoner'],
+        },
+      ],
+      allProviders: [
+        {
+          provider: 'deepseek',
+          label: 'DeepSeek',
+          base_url: 'https://api.deepseek.com/v1',
+          api_key: 'sk-test',
+          models: ['deepseek-chat', 'deepseek-reasoner'],
+        },
+      ],
+      model_aliases: {
+        deepseek: { 'deepseek-reasoner': 'Reasoner Alias' },
+      },
+      model_visibility: {
+        deepseek: { mode: 'include', models: ['deepseek-reasoner'] },
+      },
+    })
+    const store = useAppStore()
+
+    await store.loadModels()
+
+    expect(store.modelAliases).toEqual({
+      deepseek: { 'deepseek-reasoner': 'Reasoner Alias' },
+    })
+    expect(store.modelVisibility).toEqual({
+      deepseek: { mode: 'include', models: ['deepseek-reasoner'] },
+    })
+    expect(store.selectedModel).toBe('deepseek-reasoner')
+    expect(store.selectedProvider).toBe('deepseek')
+    expect(store.displayModelName('deepseek-reasoner', 'deepseek')).toBe('Reasoner Alias')
+    expect(store.customModels).toEqual({})
+  })
+
   it('persists model visibility without changing the canonical selected model id', async () => {
     mockSystemApi.fetchAvailableModels.mockResolvedValue({
       default: 'deepseek-reasoner',
@@ -118,4 +164,127 @@ describe('App Store', () => {
     expect(consoleError).toHaveBeenCalledWith('Failed to update Hermes Web UI:', expect.any(Error))
     consoleError.mockRestore()
   })
+
+  it('loads model aliases and resolves display names without changing canonical IDs', async () => {
+    mockSystemApi.fetchAvailableModels.mockResolvedValue({
+      default: 'deepseek-v4-flash',
+      default_provider: 'deepseek',
+      groups: [{
+        provider: 'deepseek',
+        label: 'DeepSeek',
+        base_url: 'https://api.deepseek.com/v1',
+        models: ['deepseek-v4-flash'],
+        api_key: '',
+      }],
+      allProviders: [],
+      model_aliases: {
+        deepseek: { 'deepseek-v4-flash': 'Flash Alias' },
+      },
+    })
+    const store = useAppStore()
+
+    await store.loadModels()
+
+    expect(store.selectedModel).toBe('deepseek-v4-flash')
+    expect(store.getModelAlias('deepseek-v4-flash', 'deepseek')).toBe('Flash Alias')
+    expect(store.displayModelName('deepseek-v4-flash', 'deepseek')).toBe('Flash Alias')
+    expect(store.displayModelName('unknown', 'deepseek')).toBe('unknown')
+  })
+
+  it('keeps aliases scoped to their provider when model IDs overlap', async () => {
+    mockSystemApi.fetchAvailableModels.mockResolvedValue({
+      default: 'shared-model',
+      default_provider: 'provider-a',
+      groups: [
+        {
+          provider: 'provider-a',
+          label: 'Provider A',
+          base_url: 'https://a.example/v1',
+          models: ['shared-model'],
+          api_key: '',
+        },
+        {
+          provider: 'provider-b',
+          label: 'Provider B',
+          base_url: 'https://b.example/v1',
+          models: ['shared-model'],
+          api_key: '',
+        },
+      ],
+      allProviders: [],
+      model_aliases: {
+        'provider-a': { 'shared-model': 'A Alias' },
+      },
+    })
+    const store = useAppStore()
+
+    await store.loadModels()
+
+    expect(store.displayModelName('shared-model', 'provider-a')).toBe('A Alias')
+    expect(store.displayModelName('shared-model', 'provider-b')).toBe('shared-model')
+    expect(store.displayModelName('shared-model')).toBe('A Alias')
+  })
+
+  it('rehydrates an active unlisted default model as removable after loading models', async () => {
+    mockSystemApi.fetchAvailableModels.mockResolvedValue({
+      default: 'manually-supported-id',
+      default_provider: 'deepseek',
+      groups: [{
+        provider: 'deepseek',
+        label: 'DeepSeek',
+        base_url: 'https://api.deepseek.com/v1',
+        models: ['deepseek-v4-flash'],
+        api_key: '',
+      }],
+      allProviders: [],
+      model_aliases: {},
+    })
+    const store = useAppStore()
+
+    await store.loadModels()
+
+    expect(store.selectedModel).toBe('manually-supported-id')
+    expect(store.customModels).toEqual({ deepseek: ['manually-supported-id'] })
+  })
+
+  it('saves and clears model aliases via the Web UI-only alias API', async () => {
+    mockSystemApi.updateModelAlias.mockResolvedValue(undefined)
+    const store = useAppStore()
+
+    await store.setModelAlias('deepseek-v4-flash', 'deepseek', '  Flash Alias  ')
+
+    expect(mockSystemApi.updateModelAlias).toHaveBeenCalledWith({
+      provider: 'deepseek',
+      model: 'deepseek-v4-flash',
+      alias: 'Flash Alias',
+    })
+    expect(store.modelAliases).toEqual({ deepseek: { 'deepseek-v4-flash': 'Flash Alias' } })
+
+    await store.setModelAlias('deepseek-v4-flash', 'deepseek', '')
+    expect(store.modelAliases).toEqual({})
+  })
+
+  it('removes an unlisted custom model and falls back to a listed model when active', async () => {
+    mockSystemApi.updateDefaultModel.mockResolvedValue(undefined)
+    const store = useAppStore()
+    store.modelGroups = [{
+      provider: 'deepseek',
+      label: 'DeepSeek',
+      base_url: 'https://api.deepseek.com/v1',
+      models: ['deepseek-v4-flash'],
+      api_key: '',
+    }]
+
+    await store.switchModel('test', 'deepseek')
+    expect(store.selectedModel).toBe('test')
+    expect(store.customModels).toEqual({ deepseek: ['test'] })
+
+    await store.removeCustomModel('test', 'deepseek')
+    expect(store.customModels).toEqual({})
+    expect(store.selectedModel).toBe('deepseek-v4-flash')
+    expect(mockSystemApi.updateDefaultModel).toHaveBeenLastCalledWith({
+      default: 'deepseek-v4-flash',
+      provider: 'deepseek',
+    })
+  })
 })
diff --git a/tests/server/model-alias-controller.test.ts b/tests/server/model-alias-controller.test.ts
new file mode 100644
index 00000000..4fad9a04
--- /dev/null
+++ b/tests/server/model-alias-controller.test.ts
@@ -0,0 +1,130 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+const { mockReadAppConfig, mockWriteAppConfig } = vi.hoisted(() => ({
+  mockReadAppConfig: vi.fn(),
+  mockWriteAppConfig: vi.fn(),
+}))
+
+vi.mock('../../packages/server/src/services/app-config', () => ({
+  readAppConfig: mockReadAppConfig,
+  writeAppConfig: mockWriteAppConfig,
+}))
+
+vi.mock('../../packages/server/src/services/config-helpers', () => ({
+  readConfigYaml: vi.fn(),
+  writeConfigYaml: vi.fn(),
+  fetchProviderModels: vi.fn(),
+  buildModelGroups: vi.fn(() => ({ default: '', default_provider: '', groups: [] })),
+  PROVIDER_ENV_MAP: {},
+}))
+
+vi.mock('../../packages/server/src/shared/providers', () => ({
+  buildProviderModelMap: vi.fn(() => ({})),
+  PROVIDER_PRESETS: [],
+}))
+
+vi.mock('../../packages/server/src/services/hermes/copilot-models', () => ({
+  getCopilotModelsDetailed: vi.fn(),
+  resolveCopilotOAuthToken: vi.fn(),
+}))
+
+vi.mock('../../packages/server/src/db', () => ({
+  getDb: vi.fn(),
+}))
+
+vi.mock('../../packages/server/src/db/hermes/schemas', () => ({
+  MODEL_CONTEXT_TABLE: 'model_context',
+}))
+
+import { setModelAlias } from '../../packages/server/src/controllers/hermes/models'
+
+describe('model alias controller', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockWriteAppConfig.mockResolvedValue({})
+  })
+
+  function createCtx(body: unknown) {
+    return {
+      request: { body },
+      status: 200,
+      body: undefined as unknown,
+    }
+  }
+
+  it('saves a trimmed alias in Web UI app config', async () => {
+    mockReadAppConfig.mockResolvedValue({
+      modelAliases: {
+        deepseek: { old: 'Old Alias' },
+      },
+    })
+    const ctx = createCtx({ provider: 'deepseek', model: 'deepseek-v4-flash', alias: '  Flash Alias  ' })
+
+    await setModelAlias(ctx)
+
+    expect(mockWriteAppConfig).toHaveBeenCalledWith({
+      modelAliases: {
+        deepseek: {
+          old: 'Old Alias',
+          'deepseek-v4-flash': 'Flash Alias',
+        },
+      },
+    })
+    expect(ctx.body).toEqual({
+      success: true,
+      model_aliases: {
+        deepseek: {
+          old: 'Old Alias',
+          'deepseek-v4-flash': 'Flash Alias',
+        },
+      },
+    })
+  })
+
+  it('deletes an alias when alias is blank and removes empty provider entries', async () => {
+    mockReadAppConfig.mockResolvedValue({
+      modelAliases: {
+        deepseek: { 'deepseek-v4-flash': 'Flash Alias' },
+      },
+    })
+    const ctx = createCtx({ provider: 'deepseek', model: 'deepseek-v4-flash', alias: '   ' })
+
+    await setModelAlias(ctx)
+
+    expect(mockWriteAppConfig).toHaveBeenCalledWith({ modelAliases: {} })
+    expect(ctx.body).toEqual({ success: true, model_aliases: {} })
+  })
+
+  it('rejects missing provider or model', async () => {
+    const ctx = createCtx({ provider: 'deepseek', alias: 'Alias' })
+
+    await setModelAlias(ctx)
+
+    expect(ctx.status).toBe(400)
+    expect(ctx.body).toEqual({ error: 'Invalid provider, model, or alias' })
+    expect(mockWriteAppConfig).not.toHaveBeenCalled()
+  })
+
+  it('stores inherited Object.prototype names as own alias keys', async () => {
+    mockReadAppConfig.mockResolvedValue({})
+    const ctx = createCtx({ provider: 'toString', model: 'valueOf', alias: 'Safe Alias' })
+
+    await setModelAlias(ctx)
+
+    const written = mockWriteAppConfig.mock.calls[0][0]
+    expect(written.modelAliases.toString.valueOf).toBe('Safe Alias')
+    expect(Object.prototype.hasOwnProperty.call(written.modelAliases, 'toString')).toBe(true)
+    expect(Object.prototype.hasOwnProperty.call(written.modelAliases.toString, 'valueOf')).toBe(true)
+  })
+
+  it('rejects reserved object keys to avoid prototype pollution', async () => {
+    const ctx = createCtx({ provider: '__proto__', model: 'deepseek-v4-flash', alias: 'Alias' })
+
+    await setModelAlias(ctx)
+
+    expect(ctx.status).toBe(400)
+    expect(ctx.body).toEqual({ error: 'Invalid provider or model' })
+    expect(mockWriteAppConfig).not.toHaveBeenCalled()
+    expect(({} as Record<string, unknown>).deepseek).toBeUndefined()
+  })
+})
diff --git a/tests/server/model-visibility-controller.test.ts b/tests/server/model-visibility-controller.test.ts
index 00e84af6..e5cadb64 100644
--- a/tests/server/model-visibility-controller.test.ts
+++ b/tests/server/model-visibility-controller.test.ts
@@ -1,12 +1,14 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
-const { mockReadFile, mockReadConfigYaml, mockFetchProviderModels, mockBuildModelGroups, mockReadAppConfig, mockWriteAppConfig } = vi.hoisted(() => ({
+const { mockReadFile, mockReadConfigYaml, mockFetchProviderModels, mockBuildModelGroups, mockReadAppConfig, mockWriteAppConfig, mockExistsSync, mockReadFileSync } = vi.hoisted(() => ({
   mockReadFile: vi.fn(),
   mockReadConfigYaml: vi.fn(),
   mockFetchProviderModels: vi.fn(),
   mockBuildModelGroups: vi.fn(() => ({ default: '', groups: [] })),
   mockReadAppConfig: vi.fn(),
   mockWriteAppConfig: vi.fn(),
+  mockExistsSync: vi.fn(() => false),
+  mockReadFileSync: vi.fn(),
 }))
 
 vi.mock('fs/promises', () => ({
@@ -14,8 +16,8 @@ vi.mock('fs/promises', () => ({
 }))
 
 vi.mock('fs', () => ({
-  existsSync: vi.fn(() => false),
-  readFileSync: vi.fn(),
+  existsSync: mockExistsSync,
+  readFileSync: mockReadFileSync,
 }))
 
 vi.mock('../../packages/server/src/services/hermes/hermes-profile', () => ({
@@ -30,12 +32,14 @@ vi.mock('../../packages/server/src/services/config-helpers', () => ({
   buildModelGroups: mockBuildModelGroups,
   PROVIDER_ENV_MAP: {
     deepseek: { api_key_env: 'DEEPSEEK_API_KEY' },
+    openrouter: {},
   },
 }))
 
 vi.mock('../../packages/server/src/shared/providers', () => ({
   buildProviderModelMap: () => ({
     deepseek: ['deepseek-chat', 'deepseek-reasoner'],
+    openrouter: ['openrouter/auto'],
   }),
   PROVIDER_PRESETS: [
     {
@@ -44,6 +48,12 @@ vi.mock('../../packages/server/src/shared/providers', () => ({
       base_url: 'https://api.deepseek.com/v1',
       models: ['deepseek-chat', 'deepseek-reasoner'],
     },
+    {
+      value: 'openrouter',
+      label: 'OpenRouter',
+      base_url: 'https://openrouter.ai/api/v1',
+      models: ['openrouter/auto'],
+    },
   ],
 }))
 
@@ -78,6 +88,8 @@ beforeEach(() => {
   mockBuildModelGroups.mockReturnValue({ default: '', groups: [] })
   mockReadAppConfig.mockResolvedValue({})
   mockWriteAppConfig.mockImplementation(async patch => patch)
+  mockExistsSync.mockReturnValue(false)
+  mockReadFileSync.mockReturnValue('{}')
 })
 
 describe('models controller — model visibility', () => {
@@ -104,6 +116,27 @@ describe('models controller — model visibility', () => {
       deepseek: { mode: 'include', models: ['deepseek-reasoner'] },
     })
   })
+  it('accepts OAuth providers stored in credential_pool entries', async () => {
+    mockExistsSync.mockReturnValue(true)
+    mockReadFileSync.mockReturnValue(JSON.stringify({
+      credential_pool: {
+        openrouter: [{ label: 'primary', access_token: 'oauth-token' }],
+      },
+    }))
+
+    const ctx = makeCtx()
+    await ctrl.getAvailable(ctx)
+
+    expect(ctx.status).toBe(200)
+    expect(ctx.body.groups).toEqual(expect.arrayContaining([
+      expect.objectContaining({
+        provider: 'openrouter',
+        label: 'OpenRouter',
+        models: ['openrouter/auto'],
+        available_models: ['openrouter/auto'],
+      }),
+    ]))
+  })