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GPT-5 Mini vs Mistral Medium 3

GPT-5 Mini leads Mistral Medium 3 on the Artificial Analysis Intelligence Index, 20.6 to 9.0, at about the same output price ($2.00 vs $2.00 per million). Updated October 21, 2026; 57 benchmarks have a result for both.

Replace GPT-5 Mini Replace Mistral Medium 3
GPT-5 MiniOpenAI
Coding
34.2
Overall
43.7
Output $/M
$2.00
46
Mistral Medium 3Mistral AI
Coding
No data
Overall
No data
Output $/M
$2.00
11
vs boards won of 57 shared

GPT-5 Mini or Mistral Medium 3: which to pick

Only GPT-5 Mini has a coding score, 34.2 on the Vibe Coding Index; Mistral Medium 3 has none, so the two cannot be ranked on coding.

Pick Mistral Medium 3 for work measured by LMArena Text: science or LMArena Text: medicine and healthcare, where it leads.

Model AGPT-5 MiniOpenAI34.2/1002 independent benchmarks$0.08 per solved taskModel BMistral Medium 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
57
GPT-5 Mini only
44
Mistral Medium 3 only
0
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

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
GPT-5 Mini 34.2 from 2 benchmarks, Mistral Medium 3 not benchmarked.
Widest category
Agentic work, 46.8 points apart on average over 1 shared benchmark.
Widest single gap
AA Math Index: GPT-5 Mini 90.7 against Mistral Medium 3 30.3, 60.4 points apart on a 0 to 100 scale.
Output price
Both cost $2.00 per million output tokens.
Context window
GPT-5 Mini takes 400K tokens, Mistral Medium 3 131K.

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
CategoryGPT-5 MiniBarsMistral Medium 3Ties
Coding40
Intelligence20
Agentic work10
Reasoning70
Math40
Knowledge23
Web design51
General217
All shared boards4611
CodingLike-for-likeSix of these boards feed the Vibe Coding Index40
Coding benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
SWE-bench Verified59.8%Not measuredOnly GPT-5 Mini measured
SWE-bench Multilingual39.7%Not measuredOnly GPT-5 Mini measured
LiveCodeBench (Vals AI)86.6%Not measuredOnly GPT-5 Mini measured
SWE-bench Verified (Vals AI)60.8%Not measuredOnly GPT-5 Mini measured
Vibe Code Bench (Vals AI)14.2%Not measuredOnly GPT-5 Mini measured
LiveCodeBench (Artificial Analysis run)83.8%40.0%GPT-5 Mini
SciCode39.0%Not measuredOnly GPT-5 Mini measured
Terminal-Bench Hard (Artificial Analysis run)33.3%3.8%GPT-5 Mini
Terminal-Bench34.8%Not measuredOnly GPT-5 Mini measured
WeirdML52.7%Not measuredOnly GPT-5 Mini measured
LMArena Text: coding14061385GPT-5 Mini
LMArena Text: software and IT13941385GPT-5 Mini
Neither model has a result on the other 27 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
AA Intelligence Index20.69.0GPT-5 Mini
Epoch Capabilities Index145.3134.0GPT-5 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
τ²-Bench Telecom71.1%24.3%GPT-5 Mini
Vending-Bench 2-$31Not measuredOnly GPT-5 Mini measured
Berkeley Function Calling Leaderboard (BFCL)55.5%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 38 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index70
Reasoning benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
GPQA Diamond80.3%Not measuredOnly GPT-5 Mini measured
MMMU Pro (Vals AI)78.9%Not measuredOnly GPT-5 Mini measured
GPQA Diamond (Artificial Analysis run)82.8%57.8%GPT-5 Mini
Humanity's Last Exam (Artificial Analysis run)21.5%4.1%GPT-5 Mini
GPQA Diamond (Epoch AI run)75.0%Not measuredOnly GPT-5 Mini measured
ARC-AGI54.3%Not measuredOnly GPT-5 Mini measured
ARC-AGI-24.4%Not measuredOnly GPT-5 Mini measured
Chess puzzles24.0%Not measuredOnly GPT-5 Mini measured
Mystery game puzzles10.0%Not measuredOnly GPT-5 Mini measured
VPCT40.2%Not measuredOnly GPT-5 Mini measured
LMArena Text: hard prompts13801364GPT-5 Mini
LMArena Text: expert13791342GPT-5 Mini
LMArena Text: hard prompts in English13831374GPT-5 Mini
LMArena Vision: diagrams12021155GPT-5 Mini
LMArena Vision: homework12101165GPT-5 Mini
Kagi LLM Benchmark70.3%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
AIME91.5%Not measuredOnly GPT-5 Mini measured
MATH 500 (Vals AI)94.8%Not measuredOnly GPT-5 Mini measured
MGSM (Vals AI)92.6%Not measuredOnly GPT-5 Mini measured
AA Math Index90.730.3GPT-5 Mini
AIME 2025 (Artificial Analysis run)90.7%30.3%GPT-5 Mini
OTIS Mock AIME86.7%Not measuredOnly GPT-5 Mini measured
FrontierMath, tiers 1 to 346.7%Not measuredOnly GPT-5 Mini measured
FrontierMath, tier 412.2%Not measuredOnly GPT-5 Mini measured
ProofBench9.0%Not measuredOnly GPT-5 Mini measured
MATH level 597.8%Not measuredOnly GPT-5 Mini measured
LMArena Text: math13781353GPT-5 Mini
LMArena Text: mathematical work13801354GPT-5 Mini
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index23
Knowledge benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
MMLU Pro82.2%Not measuredOnly GPT-5 Mini measured
LegalBench (Vals AI)81.8%Not measuredOnly GPT-5 Mini measured
CaseLaw (Vals AI)68.5%Not measuredOnly GPT-5 Mini measured
CorpFin (Vals AI)60.2%Not measuredOnly GPT-5 Mini measured
TaxEval (Vals AI)75.2%Not measuredOnly GPT-5 Mini measured
MortgageTax (Vals AI)66.9%Not measuredOnly GPT-5 Mini measured
MedQA (Vals AI)96.1%Not measuredOnly GPT-5 Mini measured
MedCode (Vals AI)43.0%Not measuredOnly GPT-5 Mini measured
MMLU Pro (Artificial Analysis run)83.7%76.0%GPT-5 Mini
SimpleQA Verified21.6%Not measuredOnly GPT-5 Mini measured
LMArena Text: science13711381Mistral Medium 3
LMArena Text: medicine and healthcare13801381Mistral Medium 3
LMArena Text: legal and government13751384Mistral Medium 3
LMArena Text: business and finance13581352GPT-5 Mini
FACTS Benchmark Suite38.6%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index51
Web design benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
Design Arena: websites11251079GPT-5 Mini
Design Arena: UI components11061024GPT-5 Mini
Design Arena: game dev11301018GPT-5 Mini
Design Arena: data viz11301034GPT-5 Mini
Design Arena: 3D10371084Mistral Medium 3
Design Arena: all code categories11151069GPT-5 Mini
Design Arena: SVG1091Not measuredOnly GPT-5 Mini measured
Design Arena: ASCII art1125Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index217
General benchmarks for GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
SAGE (Vals AI)43.0%Not measuredOnly GPT-5 Mini measured
MedScribe (Vals AI)80.6%Not measuredOnly GPT-5 Mini measured
IFBench75.4%39.3%GPT-5 Mini
Long context reasoning (AA-LCR)72.3%31.3%GPT-5 Mini
DTBench80.5%62.3%GPT-5 Mini
LMCA34.2%Not measuredOnly GPT-5 Mini measured
Fiction.LiveBench69.4%Not measuredOnly GPT-5 Mini measured
Creative writing (Lech Mazur)83.1%Not measuredOnly GPT-5 Mini measured
LMArena Text13731370GPT-5 Mini
LMArena Text: instruction following13571338GPT-5 Mini
LMArena Text: creative writing13251343Mistral Medium 3
LMArena Vision12021157GPT-5 Mini
LMArena Text: English13791385Mistral Medium 3
LMArena Text: non-English13631353GPT-5 Mini
LMArena Text: Chinese13861374GPT-5 Mini
LMArena Text: German13661377Mistral Medium 3
LMArena Text: Japanese13411316GPT-5 Mini
LMArena Text: Korean13081304GPT-5 Mini
LMArena Text: French13861368GPT-5 Mini
LMArena Text: Spanish13541364Mistral Medium 3
LMArena Text: Russian13621359GPT-5 Mini
LMArena Text: Polish13781371GPT-5 Mini
LMArena Text: multi-turn13631384Mistral Medium 3
LMArena Text: longer queries13551360Mistral Medium 3
LMArena Text: writing and language13441352Mistral Medium 3
LMArena Text: entertainment and media13401335GPT-5 Mini
LMArena Vision: English12161172GPT-5 Mini
LMArena Vision: Chinese12141161GPT-5 Mini
LMArena Vision: reading text11991154GPT-5 Mini
LMArena Vision: humor12051145GPT-5 Mini
LMArena Vision: captioning12171094GPT-5 Mini
LMArena Vision: recognizing things12261141GPT-5 Mini
LMArena Vision: creative writing11811146GPT-5 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 GPT-5 Mini and Mistral Medium 3
BenchmarkGPT-5 MiniMistral Medium 3Leader
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

GPT-5 Mini$0.0013Fits in one request
Mistral Medium 3$0.0014Fits in one request

GPT-5 Mini costs less

Repository review

50K input + 3K output tokens

GPT-5 Mini$0.018Fits in one request
Mistral Medium 3$0.026Fits in one request

GPT-5 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-5 Mini$0.070Fits in one request
Mistral Medium 3$0.100Exceeds the context window

GPT-5 Mini 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 GPT-5 Mini and Mistral Medium 3
SpecificationOpenAI GPT-5 MiniMistral Medium 3
MakerOpenAIMistral AI
WeightsNo public weights listedNo public weights listed
ReleasedAugust 7, 2025May 7, 2025
Context window400K131K
Input $/Mtok$0.25$0.40
Output $/Mtok$2.00$2.00
Coding index34.2Not benchmarked
Independent measurements behind it20
Cost per solved task$0.08Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5 Mini better than Mistral Medium 3 for coding?

Only GPT-5 Mini has a coding score, 34.2 on the Vibe Coding Index; Mistral Medium 3 has none, so the two cannot be ranked on coding. Pick Mistral Medium 3 for work measured by LMArena Text: science or LMArena Text: medicine and healthcare, where it leads.

Which is cheaper, GPT-5 Mini or Mistral Medium 3?

GPT-5 Mini costs $0.25 per million input tokens and $2.00 per million output tokens; Mistral Medium 3 costs $0.40 and $2.00. Cost per solved task is known for GPT-5 Mini only.

Which has the bigger context window, GPT-5 Mini or Mistral Medium 3?

GPT-5 Mini, with 400K tokens against 131K.

How many benchmarks is the GPT-5 Mini vs Mistral Medium 3 comparison based on?

57 benchmarks have a result for both models as of October 21, 2026. GPT-5 Mini's coding index rests on 2 independent benchmarks and Mistral Medium 3's on 0. Where only one model has a result, the page says so instead of naming a winner.

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