Mistral Medium 3.1
Summary
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.
Mistral model for multilingual chat, reasoning, and tool-assisted workflows
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Mistral AI |
|---|---|
| Release date | 12 Aug 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 262K (262,144 tokens) [models.dev] |
| Max output | 262K tokens [models.dev] |
| Knowledge cutoff | May 2025 [models.dev] |
| Input | Text and images [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
Mistral Medium 3.1 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Mistral API mistral-medium-2508 | $0.40 | $2 | – | 262K | models.dev, 4 Oct 2026 |
| OpenRouter mistralai/mistral-medium-3.1 | $0.40 | $2 | $0.04 | 131K | OpenRouter, 4 Oct 2026 |
Frequently asked questions
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.
Change history
No changes detected since we started tracking this model. We re-check every source daily.