Mistral Medium 3.1

Mistral· released 13 Aug 2025

mistralai/mistral-medium-3.1

Input / 1M tokens: $0.4
Output / 1M tokens: $2

Context window131K tokens

Longest answer: 105K tokens

reads textreads imagereads filetool callingvision

About

Mistral Medium 3.1 is an updated version of Mistral Medium 3 from Mistral. It is described as a high-performance, enterprise-grade language model intended to provide frontier-level capabilities with reduced operational cost. The model accepts text, images, and files as inputs, and produces text outputs. It supports tools and vision, giving applications access to tool use and visual input handling. Its context window holds 131,072 tokens, while the maximum output is 104,857 tokens. Mistral Medium 3.1 uses the model ID mistralai/mistral-medium-3.1 and belongs to the mistralai family. The model was released and created on August 13, 2025. Pricing is listed at $0.40 per 1 million input tokens and $2 per 1 million output tokens. The official listing is hosted at openrouter.ai/mistralai/mistral-medium-3.1.

Who it is for

Mistral Medium 3.1 suits enterprise applications needing text generation with image and file inputs. It also fits teams that need tool support and a 131,072-token context window.

What is good

Accepts text, image, and file inputs
Supports tools and vision
131,072-token context window
104,857-token maximum output
$0.40 per 1M input tokens

What to know first

Outputs text only
$2 per 1M output tokens
Released August 13, 2025

Verdict

Mistral Medium 3.1 combines multimodal inputs, tool support, and a large context window. Its listed pricing separates input and output costs, with output tokens priced higher.

Details

Lab: Mistralopenrouter.ai · 3 Oct 2026
Context: 131Kopenrouter.ai · 3 Oct 2026
Input price: $0.4 / 1Mopenrouter.ai · 3 Oct 2026
Output price: $2 / 1Mopenrouter.ai · 3 Oct 2026
Max output: 104,857 tokensopenrouter.ai · 3 Oct 2026
Inputs: text, image, fileopenrouter.ai · 3 Oct 2026
Open weights: Noopenrouter.ai · 3 Oct 2026

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Sources

openrouter.ai/mistralai/mistral-medium-3.1· checked 3 Oct 2026