xAI · Model retirement
grok-4-1-fast-non-reasoning
Redirected
Since May 15, 2026, xAI answers calls to the model grok-4-1-fast-non-reasoning from a newer version.
What to use instead of grok-4-1-fast-non-reasoning
Move to grok-4.3 with none reasoning effort, recommended by xAI.
Facts
- API
- xAI
api.x.ai - Model
grok-4-1-fast-non-reasoning- Kind
- Model retirement
- Takes effect
- May 15, 2026
- Calls after that day
- Answered by a newer version
- Source
- Model notices
- Last updated
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- grok-4-fast-non-reasoning Redirected
- grok-4-fast-reasoning Redirected