Mistral
open-mistral-nemo-2407 model retirement
Stopped workingSubscribe to MistralShare
Mistral retired the open-mistral-nemo-2407 model on July 31, 2026. Calls specifying model open-mistral-nemo-2407 fail since that date. The retirement was originally announced on May 22, 2026.
The error you get
What Mistral answers a call to open-mistral-nemo-2407 once the model is gone, as recorded from real responses:
{"object":"error","message":"Invalid model: open-mistral-nemo-2407","type":"invalid_model","param":null,"code":"1500"}What to use instead of open-mistral-nemo-2407
Mistral recommends migrating to Ministral 3 8B.
Facts
- API
- Mistral
api.mistral.ai - Model
open-mistral-nemo-2407- Kind
- Model retirement
- Announced
- May 22, 2026
- Takes effect
- July 31, 2026
- Calls after that day
- Fail
- Source
- Lifecycle page
- Last updated
- Verified
- , against Mistral's own pages
Questions
When does open-mistral-nemo-2407 shut down?
Calls to the model open-mistral-nemo-2407 stopped working on July 31, 2026.
What happens to calls after July 31, 2026?
They have failed since July 31, 2026.
What error does open-mistral-nemo-2407 return once it is shut down?
Mistral answers HTTP 400: "Invalid model: open-mistral-nemo-2407". 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.