Vertex AI
xai/grok-4.1-fast-non-reasoning model retirement
Deprecated, no dateSubscribe to Vertex AIShare
Vertex AI deprecated the model xai/grok-4.1-fast-non-reasoning without giving a shutdown date yet.
Facts
- API
- Vertex AI
aiplatform.googleapis.com - Model
xai/grok-4.1-fast-non-reasoning- Released
- November 19, 2025 (models.dev)
- Kind
- Model retirement
- Takes effect
- No date given yet
- Calls after that day
- Fail
- Source
- models.dev
- Last updated
- Verified
- , against Vertex AI's own pages
Questions
When does xai/grok-4.1-fast-non-reasoning shut down?
Vertex AI deprecated the model xai/grok-4.1-fast-non-reasoning without giving a shutdown date yet.
Do these calls still work?
Yes, they still work: Vertex AI has not given a shutdown date yet.
When was xai/grok-4.1-fast-non-reasoning released?
xai/grok-4.1-fast-non-reasoning was released on November 19, 2025, according to models.dev.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
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Is your code calling this?
Okapi finds the calls this change hits in your repo and opens the pull request with the fix.