# open-mistral-nemo-2407

Calls to the model open-mistral-nemo-2407 stopped working on July 31, 2026.

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 Mistral returns once open-mistral-nemo-2407 is gone

HTTP 400

```json
{"object":"error","message":"Invalid model: open-mistral-nemo-2407","type":"invalid_model","param":null,"code":"1500"}
```

## What to use instead

Mistral recommends migrating to Ministral 3 8B.

- 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
- Calls it hits: `model open-mistral-nemo-2407`
- Source: [Lifecycle page](https://docs.mistral.ai/getting-started/models/models_overview/)
- Verified: November 6, 2026, against Mistral's own pages
- Page: https://www.okapi.bot/models/mistral/open-mistral-nemo-2407/

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent