_PROVIDER_MODELS["xai"] was pointing at model IDs the xAI direct API
no longer accepts:
- grok-4.20-reasoning
- grok-4-1-fast-reasoning
Replaced with the actual current xAI catalog IDs from models.dev
($HERMES_HOME/models_dev_cache.json, mirror of https://models.dev/api.json):
grok-4.20-0309-reasoning
grok-4.20-0309-non-reasoning
grok-4.20-multi-agent-0309
grok-4-1-fast
grok-4-1-fast-non-reasoning
grok-4-fast
grok-4-fast-non-reasoning
grok-4
grok-code-fast-1
The xAI-direct API (https://api.x.ai/v1) serves the dated IDs shown
above; the bare aliases (grok-4.20, grok-4.1-fast, etc.) are
OpenRouter/Vercel-gateway normalizations and are not accepted on
xAI-direct. Those gateways remain unaffected.
Fixes#16699
vominh1919
6c78305294