xAI is retiring grok-4, grok-4-0709, grok-4-fast{,-reasoning,-non-reasoning},
grok-4-1-fast{,-reasoning,-non-reasoning}, and grok-code-fast-1 on
May 15, 2026 at 12:00 PT. Remove them from the static fallbacks so the
`hermes model` picker, gateway /model picker, and setup wizard stop
auto-suggesting models that will be dead in days.
- _XAI_STATIC_FALLBACK in hermes_cli/models.py now lists only grok-4.20-*
and grok-4.3 (the live replacements).
- copilot lists in hermes_cli/models.py and hermes_cli/setup.py drop
grok-code-fast-1 (Copilot proxies it through xAI, so the upstream
retirement breaks it there too).
Old configs that already reference retired IDs keep working until xAI
flips the switch — context-length lookups in agent/model_metadata.py and
the cache-affinity-header logic in provider_profiles still recognise the
old names. The cleanup here is purely about not advertising them to new
users.
Closes#23278.
Source: https://docs.x.ai/developers/migration/may-15-retirement
594209389d