Mistral AI · model

`labs-leanstral-2603` deprecation: shutdown date & replacement

Shut down June 30, 2026

'announced' is the deprecation date from the table. Replacement is given as a display name (API id not stated in the table).

How to migrate off labs-leanstral-2603

Find every place that references it:

grep -rn --exclude-dir={node_modules,.git,dist} "labs-leanstral-2603" .

Replace the model ID:

- model: "labs-leanstral-2603"
+ model: "Leanstral 1.5"

Re-run your evals or a sample of real prompts — output style, token usage and pricing can change between models.
Check config outside code too: environment variables, feature flags, prompt-management tools, and fine-tuned model references.
Deploy before June 30, 2026, and add the CI scanner so it cannot come back.

Is labs-leanstral-2603 deprecated?

Yes. Mistral AI has deprecated labs-leanstral-2603. It was shut down on June 30, 2026.

When does labs-leanstral-2603 shut down?

June 30, 2026, according to Mistral AI's official deprecation notice.

What should I use instead of labs-leanstral-2603?

Mistral AI recommends Leanstral 1.5. Switch the model ID and re-test your prompts, since outputs, pricing and limits can differ.

What happens to requests to labs-leanstral-2603 after the shutdown?

Requests using the retired model ID fail with an error, so any code still calling it breaks. Update and deploy before the shutdown date.