Mistral
labs-devstral-small-2512 model retirement
Stopped workingSubscribe to MistralShare
Calls to the model labs-devstral-small-2512 on Mistral stopped working on March 31, 2026.
The error you get
What Mistral answers a call to labs-devstral-small-2512 once the model is gone, as recorded from real responses:
{"object":"error","message":"Invalid model: labs-devstral-small-2512","type":"invalid_model","param":null,"code":"1500"}What to use instead of labs-devstral-small-2512
Mistral recommends migrating to Mistral Medium 3.5.
Facts
- API
- Mistral
api.mistral.ai - Model
labs-devstral-small-2512- Released
- December 9, 2025 (models.dev)
- Kind
- Model retirement
- Announced
- February 27, 2026
- Takes effect
- March 31, 2026
- Calls after that day
- Fail
- Source
- Lifecycle page
- Last updated
- Verified
- , against Mistral's own pages
Questions
When does labs-devstral-small-2512 shut down?
Calls to the model labs-devstral-small-2512 on Mistral stopped working on March 31, 2026.
What happens to calls after March 31, 2026?
They have failed since March 31, 2026.
What error does labs-devstral-small-2512 return once it is shut down?
Mistral answers HTTP 400: "Invalid model: labs-devstral-small-2512". Send another model to fix it.
When was labs-devstral-small-2512 released?
labs-devstral-small-2512 was released on December 9, 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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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.