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GPT-5.4 Mini vs Mistral Medium 3.1

GPT-5.4 Mini leads Mistral Medium 3.1 on the Artificial Analysis Intelligence Index, 24.1 to 9.2, and Mistral Medium 3.1 costs 2.3x less per output token ($2.00 vs $4.50 per million). Updated October 21, 2026; 57 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace Mistral Medium 3.1
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
37
Mistral Medium 3.1Mistral AI
Coding
No data
Overall
No data
Output $/M
$2.00
20
vs boards won of 57 shared

GPT-5.4 Mini or Mistral Medium 3.1: which to pick

Only GPT-5.4 Mini has a coding score, 35.8 on the Vibe Coding Index; Mistral Medium 3.1 has none, so the two cannot be ranked on coding.

Pick Mistral Medium 3.1 for output tokens 2.3x cheaper ($2.00 vs $4.50 per million) and work measured by LMArena Text: software and IT or LMArena Text: hard prompts, where it leads.

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BMistral Medium 3.1Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
57
GPT-5.4 Mini only
32
Mistral Medium 3.1 only
17
Like-for-like categories
7 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-5.4 Mini 35.8 from 5 benchmarks, Mistral Medium 3.1 not benchmarked.
Widest category
Agentic work, 29.3 points apart on average over 2 shared benchmarks.
Widest single gap
AIME: GPT-5.4 Mini 95.6% against Mistral Medium 3.1 42.3%, 53.3 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against Mistral Medium 3.1 $2.00 per million output tokens, 2.3x apart.
Context window
GPT-5.4 Mini takes 400K tokens, Mistral Medium 3.1 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-5.4 MiniBarsMistral Medium 3.1Ties
Coding61
Intelligence10
Agentic work20
Reasoning62
Math30
Knowledge44
General1513
All shared boards3720
CodingLike-for-likeSix of these boards feed the Vibe Coding Index61
Coding benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
LMArena WebDev1397Not measuredOnly GPT-5.4 Mini measured
AA Coding Index56.120.5GPT-5.4 Mini
LiveCodeBench (Vals AI)81.5%44.8%GPT-5.4 Mini
SWE-bench Verified (Vals AI)73.0%Not measuredOnly GPT-5.4 Mini measured
Terminal-Bench 4 (Vals AI)2.5%Not measuredOnly GPT-5.4 Mini measured
Vibe Code Bench (Vals AI)48.0%Not measuredOnly GPT-5.4 Mini measured
Code migration (Vals AI)12.9%Not measuredOnly GPT-5.4 Mini measured
ProgramBench (Vals AI)0.0%Not measuredOnly GPT-5.4 Mini measured
Terminal-Bench 2.1 (Vals AI)54.7%Not measuredOnly GPT-5.4 Mini measured
LiveCodeBench (Artificial Analysis run)Not measured40.6%Only Mistral Medium 3.1 measured
SciCode52.1%32.4%GPT-5.4 Mini
Terminal-Bench Hard (Artificial Analysis run)52.3%10.6%GPT-5.4 Mini
FrontierCode27.0%Not measuredOnly GPT-5.4 Mini measured
WeirdML60.3%Not measuredOnly GPT-5.4 Mini measured
ALE-Bench1188.6210.2GPT-5.4 Mini
LMArena Text: coding14381433GPT-5.4 Mini
LMArena Text: software and IT14361436Mistral Medium 3.1
LMArena WebDev: React1386Not measuredOnly GPT-5.4 Mini measured
LMArena WebDev: HTML1419Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
AA Intelligence Index24.19.2GPT-5.4 Mini
Epoch Capabilities Index148.7Not measuredOnly GPT-5.4 Mini measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index20
Agentic work benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
AA Agentic Index17.91.9GPT-5.4 Mini
Finance Agent (Vals AI)45.4%Not measuredOnly GPT-5.4 Mini measured
Tax Agent Bench (Vals AI)8.8%Not measuredOnly GPT-5.4 Mini measured
Legal Research Bench (Vals AI)12.5%Not measuredOnly GPT-5.4 Mini measured
Excel Modeling Benchmark (Vals AI)45.4%Not measuredOnly GPT-5.4 Mini measured
τ²-Bench Telecom83.3%40.6%GPT-5.4 Mini
DeepResearch Bench36.3%Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index62
Reasoning benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
GPQA Diamond83.1%Not measuredOnly GPT-5.4 Mini measured
MMMU Pro (Vals AI)79.3%63.0%GPT-5.4 Mini
GPQA Diamond (Artificial Analysis run)87.5%58.8%GPT-5.4 Mini
Humanity's Last Exam (Artificial Analysis run)28.1%4.7%GPT-5.4 Mini
GPQA Diamond (Epoch AI run)86.9%Not measuredOnly GPT-5.4 Mini measured
ARC-AGI63.7%Not measuredOnly GPT-5.4 Mini measured
ARC-AGI-218.9%Not measuredOnly GPT-5.4 Mini measured
Chess puzzles23.0%Not measuredOnly GPT-5.4 Mini measured
Mystery game puzzles11.0%Not measuredOnly GPT-5.4 Mini measured
LMArena Text: hard prompts14241426Mistral Medium 3.1
LMArena Text: expert14351408GPT-5.4 Mini
LMArena Text: hard prompts in English14201435Mistral Medium 3.1
LMArena Vision: diagrams12661175GPT-5.4 Mini
LMArena Vision: homework12851165GPT-5.4 Mini
Kagi LLM Benchmark37.9%Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
AIME95.6%42.3%GPT-5.4 Mini
MATH 500 (Vals AI)Not measured87.0%Only Mistral Medium 3.1 measured
MGSM (Vals AI)Not measured90.9%Only Mistral Medium 3.1 measured
AA Math IndexNot measured38.3Only Mistral Medium 3.1 measured
AIME 2025 (Artificial Analysis run)Not measured38.3%Only Mistral Medium 3.1 measured
OTIS Mock AIME88.9%Not measuredOnly GPT-5.4 Mini measured
FrontierMath, tiers 1 to 351.2%Not measuredOnly GPT-5.4 Mini measured
FrontierMath, tier 49.8%Not measuredOnly GPT-5.4 Mini measured
ProofBench21.0%Not measuredOnly GPT-5.4 Mini measured
LMArena Text: math14181408GPT-5.4 Mini
LMArena Text: mathematical work14291412GPT-5.4 Mini
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index44
Knowledge benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
MMLU Pro84.5%75.3%GPT-5.4 Mini
LegalBench (Vals AI)Not measured62.0%Only Mistral Medium 3.1 measured
CaseLaw (Vals AI)51.7%Not measuredOnly GPT-5.4 Mini measured
CorpFin (Vals AI)60.9%50.7%GPT-5.4 Mini
TaxEval (Vals AI)71.2%70.3%GPT-5.4 Mini
MortgageTax (Vals AI)63.5%36.5%GPT-5.4 Mini
MedQA (Vals AI)Not measured78.2%Only Mistral Medium 3.1 measured
MMLU Pro (Artificial Analysis run)Not measured68.3%Only Mistral Medium 3.1 measured
SimpleQA Verified29.4%Not measuredOnly GPT-5.4 Mini measured
LMArena Text: science14171444Mistral Medium 3.1
LMArena Text: medicine and healthcare13951449Mistral Medium 3.1
LMArena Text: legal and government14141439Mistral Medium 3.1
LMArena Text: business and finance14181418Mistral Medium 3.1
Neither model has a result on the other 5 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
Design Arena: websitesNot measured1133Only Mistral Medium 3.1 measured
Design Arena: UI componentsNot measured1100Only Mistral Medium 3.1 measured
Design Arena: game devNot measured1074Only Mistral Medium 3.1 measured
Design Arena: data vizNot measured1144Only Mistral Medium 3.1 measured
Design Arena: 3DNot measured1081Only Mistral Medium 3.1 measured
Design Arena: all code categoriesNot measured1120Only Mistral Medium 3.1 measured
Design Arena: SVGNot measured993Only Mistral Medium 3.1 measured
Design Arena: ASCII artNot measured997Only Mistral Medium 3.1 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index1513
General benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
SAGE (Vals AI)50.8%Not measuredOnly GPT-5.4 Mini measured
Vals Multimodal Index54.2%Not measuredOnly GPT-5.4 Mini measured
IFBench73.3%39.8%GPT-5.4 Mini
Long context reasoning (AA-LCR)77.0%42.7%GPT-5.4 Mini
DTBench80.0%67.5%GPT-5.4 Mini
LMCA40.8%19.1%GPT-5.4 Mini
LMArena Text14121424Mistral Medium 3.1
LMArena Text: instruction following14051398GPT-5.4 Mini
LMArena Text: creative writing13701391Mistral Medium 3.1
LMArena Vision12451172GPT-5.4 Mini
LMArena Text: English14121438Mistral Medium 3.1
LMArena Text: non-English14051408Mistral Medium 3.1
LMArena Text: Chinese14461447Mistral Medium 3.1
LMArena Text: German14081432Mistral Medium 3.1
LMArena Text: Japanese13751379Mistral Medium 3.1
LMArena Text: Korean13701380Mistral Medium 3.1
LMArena Text: French14411460Mistral Medium 3.1
LMArena Text: Spanish14051433Mistral Medium 3.1
LMArena Text: Russian14171411GPT-5.4 Mini
LMArena Text: Polish14151430Mistral Medium 3.1
LMArena Text: multi-turn14291418GPT-5.4 Mini
LMArena Text: longer queries14081406GPT-5.4 Mini
LMArena Text: writing and language13931395Mistral Medium 3.1
LMArena Text: entertainment and media13731390Mistral Medium 3.1
LMArena Vision: English12441179GPT-5.4 Mini
LMArena Vision: Chinese12861190GPT-5.4 Mini
LMArena Vision: reading text12531175GPT-5.4 Mini
LMArena Vision: humor12351168GPT-5.4 Mini
LMArena Vision: captioningNot measured1145Only Mistral Medium 3.1 measured
LMArena Vision: recognizing things12181147GPT-5.4 Mini
LMArena Vision: creative writing12221200GPT-5.4 Mini
Neither model has a result on the other 15 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5.4 Mini and Mistral Medium 3.1
BenchmarkGPT-5.4 MiniMistral Medium 3.1Leader
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-5.4 Mini$0.0030Fits in one request
Mistral Medium 3.1$0.0014Fits in one request

Mistral Medium 3.1 costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
Mistral Medium 3.1$0.026Fits in one request

Mistral Medium 3.1 costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
Mistral Medium 3.1$0.100Exceeds the context window

Mistral Medium 3.1 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-5.4 Mini and Mistral Medium 3.1
SpecificationOpenAI GPT-5.4 MiniMistral Medium 3.1
MakerOpenAIMistral AI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 17, 2026August 13, 2025
Context window400K131K
Input $/Mtok$0.75$0.40
Output $/Mtok$4.50$2.00
Coding index35.8Not benchmarked
Independent measurements behind it50
Cost per solved task$0.70Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Mini better than Mistral Medium 3.1 for coding?

Only GPT-5.4 Mini has a coding score, 35.8 on the Vibe Coding Index; Mistral Medium 3.1 has none, so the two cannot be ranked on coding. Pick Mistral Medium 3.1 for output tokens 2.3x cheaper ($2.00 vs $4.50 per million) and work measured by LMArena Text: software and IT or LMArena Text: hard prompts, where it leads.

Which is cheaper, GPT-5.4 Mini or Mistral Medium 3.1?

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; Mistral Medium 3.1 costs $0.40 and $2.00. Cost per solved task is known for GPT-5.4 Mini only.

Which has the bigger context window, GPT-5.4 Mini or Mistral Medium 3.1?

GPT-5.4 Mini, with 400K tokens against 131K.

How many benchmarks is the GPT-5.4 Mini vs Mistral Medium 3.1 comparison based on?

57 benchmarks have a result for both models as of October 21, 2026. GPT-5.4 Mini's coding index rests on 5 independent benchmarks and Mistral Medium 3.1's on 0. Where only one model has a result, the page says so instead of naming a winner.

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