The Model Index
Models/Mistral

Mistral Small 3.1

MistralReleased 17 Mar 2025Open
10795–118Index score#170 of 229 models
1/ 8Core tests taken1 of 6 areas · plus 4 anchor tests
−29Versus the frontier at releasebest then: o1Replaced by Mistral Small 3.2
$0.35/ $0.56Price per million tokensinput / output, list price
128KContext windowtokens it reads at once

Where it sitson the frontier

GPT-4o reached this score 10 months earlier.

Test resultsby area · tick = best by any model

Reasoning & knowledgeevidence
GPQA Diamond
47%
Humanity's Last Exam
no result
Mathsevidence
FrontierMath T1-3
no result
Codingno evidence yet
SWE-bench Verified
no result
Terminal-Bench
no result
Agentsevidence
APEX-Agents
no result
Novel problemsno evidence yet
ARC-AGI-2
no result
Long tasksno 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 sayrank on each leaderboard

The Model Indexindependent tests, our method#170of 219 · 107
Epoch Capabilities Indexoverall capability from many benchmarks#143of 239 · 127.5

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 attop three among current models

Replaced by Mistral Small 3.2; 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 itprices checked 1 Oct 2026

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

Released17 Mar 2025
Announcementnot linked yet
Release entry–
Scored asMistral Small 3.1
Artificial Analysis index–
Output speed–

Mistral releasesaround this one