mistral-medium-3-5 shutdown date: Apr 30, 2027 (Mistral)

The error you get from April 30, 2027

What Mistral answers a call to mistral-medium-3-5 once the model is gone, as recorded from real responses:

HTTP 400

{"object":"error","message":"Invalid model: mistral-medium-3-5","type":"invalid_model","param":null,"code":"1500"}

What to use instead of mistral-medium-3-5

Recommended by Mistral: Mistral Large 4.

Facts

API: Mistral api.mistral.ai
Model: mistral-medium-3-5
Released: April 30, 2026 (models.dev)
Kind: Model retirement
Announced: October 31, 2026
Takes effect: April 30, 2027
Calls after that day: Fail
Source: Lifecycle page
Last updated: October 31, 2026
Verified: October 31, 2026, against Mistral's own pages

Questions

When does mistral-medium-3-5 shut down?

Calls to the model mistral-medium-3-5 stop working on April 30, 2027.

What happens to calls after April 30, 2027?

They fail from that day.

What error does mistral-medium-3-5 return once it is shut down?

Mistral answers HTTP 400: "Invalid model: mistral-medium-3-5". Send another model to fix it.

When was mistral-medium-3-5 released?

mistral-medium-3-5 was released on April 30, 2026, 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 before April 30, 2027.

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Mistral mistral-medium-3-5 model retirement