# Mistral Devstral Small 1.0 — deprecation status

> Yes — Devstral Small 1.0 is retired. Mistral deprecated it on October 31, 2025 and shut it down on November 30, 2025; API requests to it now fail. The recommended replacement is Mistral Medium 3.5.

The first Devstral, released in May 2025 with All Hands AI as a model for OpenHands-style agents. It had the shortest deprecation runway of any Mistral model in the catalogue - announced 31 October 2025 and gone by 30 November, four weeks later - because 1.1 had already replaced it in practice.

## Facts

| Field | Value |
| --- | --- |
| Provider | Mistral |
| Model id | `devstral-small-2505` |
| Status | Retired |
| Deprecated | October 31, 2025 |
| Shutdown | November 30, 2025 (246 days ago) |
| 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
  - Parameters it accepts: https://modelparams.dev/models/mistral/mistral-medium-3-5-26-04

```diff
- "model": "devstral-small-2505"
+ "model": "mistral-medium-3-5-26-04"
```

## FAQ

### When did Mistral Devstral Small 1.0 shut down?

Mistral Devstral Small 1.0 shut down on November 30, 2025. API requests to it fail from that date onward.

### What replaces Mistral Devstral Small 1.0?

Mistral recommends Mistral Medium 3.5 (`mistral-medium-3-5-26-04`) as the replacement for Mistral Devstral Small 1.0.

### Is Mistral Devstral Small 1.0 still available?

No. Mistral Devstral Small 1.0 is retired and no longer served — it was shut down on November 30, 2025. Calls to it return an error.

### How do I migrate from Mistral Devstral Small 1.0 to mistral-medium-3-5-26-04?

Swap the model id in your API call: replace "devstral-small-2505" with "mistral-medium-3-5-26-04". Keep the rest of the request the same, then re-check the parameters the new model accepts before you ship.

## 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/devstral-small-2505
JSON: https://modeldeprecations.dev/api/v1/models/mistral/devstral-small-2505.json