# Mistral Medium 3.1 — deprecation status

> Yes — Mistral deprecated Mistral Medium 3.1 on May 22, 2026 and shuts it down on August 31, 2026 (in 28 days). The recommended replacement is Mistral Medium 3.5.

The August 2025 refresh of Mistral Medium 3, and the model most Mistral API traffic sat on through the second half of that year. It is deprecated but not yet gone: Mistral gave the 3.x Mediums an unusually long runway, announcing on 22 May 2026 and setting the shutdown for the end of August, so this is the one entry in the wave you can still call today.

## Facts

| Field | Value |
| --- | --- |
| Provider | Mistral |
| Model id | `mistral-medium-2508` |
| Status | Deprecated |
| Deprecated | May 22, 2026 |
| Shutdown | August 31, 2026 (in 28 days) |
| Last verified | August 3, 2026 |

## Replacement

- **Mistral Medium 3.5** (`mistral-medium-3-5-26-04`) · recommended — https://modeldeprecations.dev/mistral/mistral-medium-3-5-26-04
  - Medium 3.5 is multimodal where 3.1 was text-only, so a request that used to be rejected for containing an image part will now succeed and be billed.
  - Parameters it accepts: https://modelparams.dev/models/mistral/mistral-medium-3-5-26-04

```diff
- "model": "mistral-medium-2508"
+ "model": "mistral-medium-3-5-26-04"
```

## FAQ

### When will Mistral Medium 3.1 shut down?

Mistral Medium 3.1 is scheduled to shut down on August 31, 2026, in 28 days.

### What replaces Mistral Medium 3.1?

Mistral recommends Mistral Medium 3.5 (`mistral-medium-3-5-26-04`) as the replacement for Mistral Medium 3.1. Medium 3.5 is multimodal where 3.1 was text-only, so a request that used to be rejected for containing an image part will now succeed and be billed.

### Is Mistral Medium 3.1 still available?

Yes, for now. Mistral Medium 3.1 is deprecated but still answers requests until August 31, 2026. Deprecated models get no further updates and are the first to lose capacity.

### How do I migrate from Mistral Medium 3.1 to mistral-medium-3-5-26-04?

Swap the model id in your API call: replace "mistral-medium-2508" with "mistral-medium-3-5-26-04". Medium 3.5 is multimodal where 3.1 was text-only, so a request that used to be rejected for containing an image part will now succeed and be billed.

## Sources

- [Mistral models overview](https://docs.mistral.ai/getting-started/models/models_overview/) — accessed 2026-08-03

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Canonical page: https://modeldeprecations.dev/mistral/mistral-medium-2508
JSON: https://modeldeprecations.dev/api/v1/models/mistral/mistral-medium-2508.json