# labs-leanstral-1-5

Calls to the model labs-leanstral-1-5 on Mistral stopped working on September 30, 2026.

## The error Mistral returns once labs-leanstral-1-5 is gone

HTTP 400

```json
{"object":"error","message":"Invalid model: labs-leanstral-1-5","type":"invalid_model","param":null,"code":"1500"}
```

- API: Mistral (api.mistral.ai)
- Model: labs-leanstral-1-5
- Kind: Model retirement
- Announced: September 29, 2026
- Takes effect: September 30, 2026
- Calls after that day: fail
- Calls it hits: `model labs-leanstral-1-5`
- 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/labs-leanstral-1-5/

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