Mistral · API-only (closed weights)

Mistral Medium 3.1

Mistral Medium 3.1 is an API-only (closed weights) language model from Mistral, released August 12, 2025. The context window is 256K tokens. API price: $0.4 input / $2 output per million tokens.

Introducing Mistral Medium 3.1. Overall performance boost, tone improvement, smarter web searches. Try it now in Le Chat (default model) or via our API (`mistral-medium-2508`).

Check it against your own PC →

Lab

Mistral

Released

August 12, 2025

Weights

API-only (closed weights)

Parameters

–

Context

256K

Price / M tokens

$0.4 / $2 in / out

Epoch ECI

not yet rated

Benchmark results

Epoch AI has not published results for Mistral Medium 3.1 yet. New models are usually evaluated within days to weeks.

Links

Announcement

More from Mistral

Mistral Large 4 · Mistral Large 4 Preview · Mistral Large 4 1T A52B · Leanstral 1.5 · Mistral Medium 3.5 · Mistral Small 4 · Devstral Small 2 · Devstral 2