magistral-small-2507 shut down Nov 30, 2025 (Mistral)

The error you get

What Mistral answers a call to magistral-small-2507 once the model is gone, as recorded from real responses:

HTTP 400

{"object":"error","message":"Invalid model: magistral-small-2507","type":"invalid_model","param":null,"code":"1500"}

What to use instead of magistral-small-2507

Mistral recommends migrating to Mistral Small 4.

Facts

API: Mistral api.mistral.ai
Model: magistral-small-2507
Kind: Model retirement
Announced: October 31, 2025
Takes effect: November 30, 2025
Calls after that day: Fail
Source: Lifecycle page
Last updated: October 24, 2026
Verified: November 6, 2026, against Mistral's own pages

Questions

When does magistral-small-2507 shut down?

Calls to the model magistral-small-2507 on Mistral stopped working on November 30, 2025.

What happens to calls after November 30, 2025?

They have failed since November 30, 2025.

What error does magistral-small-2507 return once it is shut down?

Mistral answers HTTP 400: "Invalid model: magistral-small-2507". Send another model to fix it.

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.

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Mistral magistral-small-2507 model retirement