> Mistral Medium 3 is a closed AI model from Mistral, released 7 May 2025. Index score 120 (GPT-4 = 100), rank 141 of 229 ranked models. API price $0.40 in / $2.0 out per million tokens, 131K context.

[Models](https://themodelindex.org/models/) /[Mistral](https://themodelindex.org/labs/mistral/)

# Mistral Medium 3

Mistral

Released 7 May 2025

Closed

Flagship

Date verified

[Compare](https://themodelindex.org/compare/mistral-medium-3-vs-deepseek-r1-0528/) [Announcement](https://mistral.ai/news/mistral-medium-3/)

120108–131

Index score

#141 of 229 models

2/ 8

Core tests taken

1 of 6 areas · plus 5 anchor tests

−27

Versus the frontier at release

best then: o3

Replaced by [Mistral Medium 3.5](https://themodelindex.org/models/mistral-medium-3-5/)

$0.40/ $2.0

Price per million tokens

input / output, list price

131K

Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

o1-mini reached this score 8 months earlier.

## Test results · by area · tick = best by any model

Show 4 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

60%

Humanity's Last Exam

5%

Maths

evidence

FrontierMath T1-3

no result

Coding

no evidence yet

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

evidence

APEX-Agents

no result

Novel problems

no evidence yet

ARC-AGI-2

no result

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

The Model Index

independent tests, our method

#141

of 219 · 120

Epoch Capabilities Index

overall capability from many benchmarks

#124

of 239 · 134.1

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Replaced by Mistral Medium 3.5; it no longer leads any category among current models.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

Le Chat

app · subscription

↗

Mistral API

API

↗

#### API providers · 1 · per million tokens, in / out

M

Mistral

$0.44 / $2.2

cheapest

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

7 May 2025

Announcement

[mistral.ai ↗](https://mistral.ai/news/mistral-medium-3/)

Release entry

Mistral Medium 3

Scored as

Mistral Medium 3

Artificial Analysis index

–

Output speed

–

Hugging Face

closed weights

## Mistral releases · around this one

Ministral 8B

Open

16 OCT 2024

index 90

Mistral Small 3

Open

30 JAN 2025

index 106

Mistral Medium 3

Closed

7 MAY 2025

index 120

Devstral

Open

21 MAY 2025

Magistral Medium

Closed

10 JUN 2025

---
Source: https://themodelindex.org/models/mistral-medium-3/ · The Model Index · data as of 2026-10-01