Enter opens the highlighted result. Esc closes.

Mistral Medium 3 vs o4 Mini

Updated October 21, 2026. 57 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Mistral Medium 3 Replace o4 Mini
Mistral Medium 3Mistral AI
Coding
No data
Overall
9.0
Output $/M
$2.00
30
o4 MiniOpenAI
Coding
No data
Overall
16.7
Output $/M
$4.40
27
vs boards won of 57 shared

Decision reading

Neither model has a coding score yet, so the two cannot be ranked on coding.

Mistral Medium 3 has the edge where output tokens cost 2.2x less, and where what matters is LiveCodeBench (Artificial Analysis run) or Terminal-Bench Hard (Artificial Analysis run), where it leads.

Model AMistral Medium 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved taskModel Bo4 MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
57
Mistral Medium 3 only
0
o4 Mini only
37
Like-for-like categories
8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Mistral Medium 3 not benchmarked, o4 Mini not benchmarked.
Widest category
Math, 32.7 points apart on average over 4 shared benchmarks.
Widest single gap
AA Math Index: Mistral Medium 3 30.3 against o4 Mini 90.7, 60.4 points apart on a 0 to 100 scale.
Output price
Mistral Medium 3 $2.00 against o4 Mini $4.40 per million output tokens, 2.2x apart.
Context window
Mistral Medium 3 takes 131K tokens, o4 Mini 200K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryMistral Medium 3Barso4 MiniTies
Coding22
Intelligence02
Agentic work01
Reasoning25
Math04
Knowledge41
Web design60
General1612
All shared boards3027
CodingLike-for-likeSix of these boards feed the Vibe Coding Index22
Coding benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
Aider polyglotNot measured72.0%Only o4 Mini measured
SWE-bench VerifiedNot measured64.6%Only o4 Mini measured
SWE-bench MultimodalNot measured33.9%Only o4 Mini measured
LiveCodeBench (Vals AI)Not measured82.2%Only o4 Mini measured
LiveCodeBench (Artificial Analysis run)40.0%85.9%o4 Mini
Terminal-Bench Hard (Artificial Analysis run)3.8%15.2%o4 Mini
GSO-BenchNot measured3.6%Only o4 Mini measured
WeirdMLNot measured52.6%Only o4 Mini measured
LMArena Text: coding13851368Mistral Medium 3
LMArena Text: software and IT13851367Mistral Medium 3
Neither model has a result on the other 28 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
AA Intelligence Index9.016.7o4 Mini
Epoch Capabilities Index134.0145.5o4 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
τ²-Bench Telecom24.3%55.6%o4 Mini
METR time horizonsNot measured63.9%Only o4 Mini measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index25
Reasoning benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
GPQA DiamondNot measured74.5%Only o4 Mini measured
MMMU Pro (Vals AI)Not measured79.7%Only o4 Mini measured
GPQA Diamond (Artificial Analysis run)57.8%78.4%o4 Mini
Humanity's Last Exam (Artificial Analysis run)4.1%16.5%o4 Mini
GPQA Diamond (Epoch AI run)Not measured79.6%Only o4 Mini measured
ARC-AGINot measured58.7%Only o4 Mini measured
ARC-AGI-2Not measured6.1%Only o4 Mini measured
SimpleBenchNot measured38.7%Only o4 Mini measured
Chess puzzlesNot measured22.0%Only o4 Mini measured
Mystery game puzzlesNot measured5.0%Only o4 Mini measured
VPCTNot measured57.5%Only o4 Mini measured
LMArena Text: hard prompts13641351Mistral Medium 3
LMArena Text: expert13421343o4 Mini
LMArena Text: hard prompts in English13741366Mistral Medium 3
LMArena Vision: diagrams11551197o4 Mini
LMArena Vision: homework11651234o4 Mini
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
AIMENot measured83.7%Only o4 Mini measured
MATH 500 (Vals AI)Not measured94.2%Only o4 Mini measured
MGSM (Vals AI)Not measured93.4%Only o4 Mini measured
AA Math Index30.390.7o4 Mini
AIME 2025 (Artificial Analysis run)30.3%90.7%o4 Mini
OTIS Mock AIMENot measured81.7%Only o4 Mini measured
FrontierMath, tiers 1 to 3Not measured36.1%Only o4 Mini measured
FrontierMath, tier 4Not measured4.9%Only o4 Mini measured
MATH level 5Not measured97.8%Only o4 Mini measured
LMArena Text: math13531389o4 Mini
LMArena Text: mathematical work13541379o4 Mini
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index41
Knowledge benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
MMLU ProNot measured80.6%Only o4 Mini measured
LegalBench (Vals AI)Not measured79.2%Only o4 Mini measured
CorpFin (Vals AI)Not measured59.0%Only o4 Mini measured
TaxEval (Vals AI)Not measured74.8%Only o4 Mini measured
MortgageTax (Vals AI)Not measured64.8%Only o4 Mini measured
MedQA (Vals AI)Not measured96.0%Only o4 Mini measured
MedCode (Vals AI)Not measured33.8%Only o4 Mini measured
MMLU Pro (Artificial Analysis run)76.0%83.2%o4 Mini
SimpleQA VerifiedNot measured19.6%Only o4 Mini measured
GeoBenchNot measured64.0%Only o4 Mini measured
LMArena Text: science13811354Mistral Medium 3
LMArena Text: medicine and healthcare13811361Mistral Medium 3
LMArena Text: legal and government13841350Mistral Medium 3
LMArena Text: business and finance13521325Mistral Medium 3
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
Design Arena: websites1079985Mistral Medium 3
Design Arena: UI components1024983Mistral Medium 3
Design Arena: game dev10181003Mistral Medium 3
Design Arena: data viz1034990Mistral Medium 3
Design Arena: 3D1083854Mistral Medium 3
Design Arena: all code categories1069976Mistral Medium 3
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index1612
General benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
SAGE (Vals AI)Not measured41.1%Only o4 Mini measured
MedScribe (Vals AI)Not measured69.1%Only o4 Mini measured
IFBench39.3%68.7%o4 Mini
Long context reasoning (AA-LCR)31.3%61.0%o4 Mini
DTBench62.3%77.6%o4 Mini
LMCANot measured26.5%Only o4 Mini measured
Fiction.LiveBenchNot measured77.8%Only o4 Mini measured
Creative writing (Lech Mazur)Not measured75.0%Only o4 Mini measured
LMArena Text13701353Mistral Medium 3
LMArena Text: instruction following13381320Mistral Medium 3
LMArena Text: creative writing13431294Mistral Medium 3
LMArena Vision11571194o4 Mini
LMArena Text: English13851367Mistral Medium 3
LMArena Text: non-English13531337Mistral Medium 3
LMArena Text: Chinese13741354Mistral Medium 3
LMArena Text: German13771336Mistral Medium 3
LMArena Text: Japanese13161308Mistral Medium 3
LMArena Text: Korean13041312o4 Mini
LMArena Text: French13681364Mistral Medium 3
LMArena Text: Spanish13641346Mistral Medium 3
LMArena Text: Russian13591334Mistral Medium 3
LMArena Text: Polish13711358Mistral Medium 3
LMArena Text: multi-turn13841350Mistral Medium 3
LMArena Text: longer queries13601315Mistral Medium 3
LMArena Text: writing and language13521316Mistral Medium 3
LMArena Text: entertainment and media13351308Mistral Medium 3
LMArena Vision: English11721200o4 Mini
LMArena Vision: Chinese11611218o4 Mini
LMArena Vision: reading text11541197o4 Mini
LMArena Vision: humor11451199o4 Mini
LMArena Vision: captioning10941204o4 Mini
LMArena Vision: recognizing things11411218o4 Mini
LMArena Vision: creative writing11461166o4 Mini
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Mistral Medium 3 and o4 Mini
BenchmarkMistral Medium 3o4 MiniLeader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Mistral Medium 3$0.0014Fits in one request
o4 Mini$0.0033Fits in one request

Mistral Medium 3 costs less

Repository review

50K input + 3K output tokens

Mistral Medium 3$0.026Fits in one request
o4 Mini$0.068Fits in one request

Mistral Medium 3 costs less

Agent loop

200K input + 10K output tokens

Mistral Medium 3$0.100Exceeds the context window
o4 Mini$0.264Exceeds the context window

Mistral Medium 3 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Mistral Medium 3 and o4 Mini
SpecificationMistral Medium 3OpenAI o4 Mini
MakerMistral AIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedMay 7, 2025April 16, 2025
Context window131K200K
Input $/Mtok$0.40$1.10
Output $/Mtok$2.00$4.40
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Mistral Medium 3 better than o4 Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Mistral Medium 3 has the edge where output tokens cost 2.2x less, and where what matters is LiveCodeBench (Artificial Analysis run) or Terminal-Bench Hard (Artificial Analysis run), where it leads.

Which is cheaper, Mistral Medium 3 or o4 Mini?

Mistral Medium 3 costs $0.40 per million input tokens and $2.00 per million output tokens; o4 Mini costs $1.10 and $4.40. Cost per solved task is known for neither of them.

Which has the bigger context window, Mistral Medium 3 or o4 Mini?

o4 Mini, with 200K tokens against 131K.

How many benchmarks is the Mistral Medium 3 vs o4 Mini comparison based on?

57 benchmarks have a result for both models as of October 21, 2026. Mistral Medium 3's coding index rests on 0 independent benchmarks and o4 Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

Compare next