# Mistral Medium 3.1

> Mistral Medium 3.1 is a proprietary language model from Mistral AI, released on 12 Aug 2025. It accepts text and images and generates text, with a 262K-token context window and up to 262K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.40 per million input tokens and $2 per million output tokens (Mistral API), across 2 providers we track.

Source page: https://www.aimodel.directory/models/mistral-medium-3-1
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Mistral AI
- **Release date:** 12 Aug 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Context window:** 262K (262,144 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Max output:** 262K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Knowledge cutoff:** May 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Input:** Text and images (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Reasoning mode:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/mistral/models/mistral-medium-2508.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| Mistral API | $0.40 | $2 | – | 262K |
| OpenRouter | $0.40 | $2 | $0.04 | 131K |

## FAQ

### What is the context window of Mistral Medium 3.1?

Mistral Medium 3.1 has a context window of 262,144 tokens (262K) and can generate up to 262,144 tokens in a single response, according to models.dev.

### How much does the Mistral Medium 3.1 API cost?

Through Mistral API, Mistral Medium 3.1 costs $0.40 per million input tokens and $2 per million output tokens. Prices last verified 4 Oct 2026.

### Is Mistral Medium 3.1 open source?

No. Mistral Medium 3.1 is a proprietary model; Mistral AI has not released its weights. It is available through APIs including Mistral API, OpenRouter.

### When was Mistral Medium 3.1 released?

Mistral AI released Mistral Medium 3.1 on 12 Aug 2025, according to models.dev.

### Which providers offer Mistral Medium 3.1?

We track Mistral Medium 3.1 on 2 providers: Mistral API, OpenRouter.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Mistral Medium 3.1", https://www.aimodel.directory/models/mistral-medium-3-1