# Mistral Codestral Mamba 7B — deprecation status

> Yes — Codestral Mamba 7B is retired. Mistral deprecated it on June 6, 2025 and shut it down on June 6, 2025; API requests to it now fail. The recommended replacement is Codestral 25.08.

A 7B code model built on the Mamba2 state-space architecture instead of a transformer, promising linear-time inference over long contexts. It is the only non-transformer Mistral ever served, and the only entry in the table whose deprecation and retirement fall on the same day - 6 June 2025, no notice period at all.

## Facts

| Field | Value |
| --- | --- |
| Provider | Mistral |
| Model id | `open-codestral-mamba` |
| Status | Retired |
| Deprecated | June 6, 2025 |
| Shutdown | June 6, 2025 (423 days ago) |
| Last verified | August 3, 2026 |

## Replacement

- **Codestral 25.08** (`codestral-25-08`) · recommended — https://modeldeprecations.dev/mistral/codestral-25-08
  - Codestral 25.08 is a standard transformer. The linear-time long-context behaviour that was the whole point of the Mamba variant does not carry over.
  - Parameters it accepts: https://modelparams.dev/models/mistral/codestral-25-08

```diff
- "model": "open-codestral-mamba"
+ "model": "codestral-25-08"
```

## FAQ

### When did Mistral Codestral Mamba 7B shut down?

Mistral Codestral Mamba 7B shut down on June 6, 2025. API requests to it fail from that date onward.

### What replaces Mistral Codestral Mamba 7B?

Mistral recommends Codestral 25.08 (`codestral-25-08`) as the replacement for Mistral Codestral Mamba 7B. Codestral 25.08 is a standard transformer. The linear-time long-context behaviour that was the whole point of the Mamba variant does not carry over.

### Is Mistral Codestral Mamba 7B still available?

No. Mistral Codestral Mamba 7B is retired and no longer served — it was shut down on June 6, 2025. Calls to it return an error.

### How do I migrate from Mistral Codestral Mamba 7B to codestral-25-08?

Swap the model id in your API call: replace "open-codestral-mamba" with "codestral-25-08". Codestral 25.08 is a standard transformer. The linear-time long-context behaviour that was the whole point of the Mamba variant does not carry over.

## 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/open-codestral-mamba
JSON: https://modeldeprecations.dev/api/v1/models/mistral/open-codestral-mamba.json