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GPT-5.4 Mini vs Mistral Medium 3

GPT-5.4 Mini leads Mistral Medium 3 on the Artificial Analysis Intelligence Index, 24.1 to 9.0, and Mistral Medium 3 costs 2.3x less per output token ($2.00 vs $4.50 per million). Updated October 21, 2026; 46 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace Mistral Medium 3
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
46
Mistral Medium 3Mistral AI
Coding
No data
Overall
No data
Output $/M
$2.00
0
vs boards won of 46 shared

GPT-5.4 Mini or Mistral Medium 3: which to pick

Only GPT-5.4 Mini has a coding score, 35.8 on the Vibe Coding Index; Mistral Medium 3 has none, so the two cannot be ranked on coding.

Pick Mistral Medium 3 for output tokens 2.3x cheaper ($2.00 vs $4.50 per million).

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BMistral Medium 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
46
GPT-5.4 Mini only
43
Mistral Medium 3 only
11
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 not benchmarked.
Widest category
Agentic work, 59.1 points apart on average over 1 shared benchmark.
Widest single gap
τ²-Bench Telecom: GPT-5.4 Mini 83.3% against Mistral Medium 3 24.3%, 59.1 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against Mistral Medium 3 $2.00 per million output tokens, 2.3x apart.
Context window
GPT-5.4 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-5.4 MiniBarsMistral Medium 3Ties
Coding30
Intelligence20
Agentic work10
Reasoning70
Math20
Knowledge40
General270
All shared boards460
CodingLike-for-likeSix of these boards feed the Vibe Coding Index30
Coding benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
LMArena WebDev1397Not measuredOnly GPT-5.4 Mini measured
AA Coding Index56.1Not measuredOnly GPT-5.4 Mini measured
LiveCodeBench (Vals AI)81.5%Not measuredOnly GPT-5.4 Mini measured
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 measured40.0%Only Mistral Medium 3 measured
SciCode52.1%Not measuredOnly GPT-5.4 Mini measured
Terminal-Bench Hard (Artificial Analysis run)52.3%3.8%GPT-5.4 Mini
FrontierCode27.0%Not measuredOnly GPT-5.4 Mini measured
WeirdML60.3%Not measuredOnly GPT-5.4 Mini measured
ALE-Bench1188.6Not measuredOnly GPT-5.4 Mini measured
LMArena Text: coding14381385GPT-5.4 Mini
LMArena Text: software and IT14361385GPT-5.4 Mini
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 index20
Intelligence benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
AA Intelligence Index24.19.0GPT-5.4 Mini
Epoch Capabilities Index148.7134.0GPT-5.4 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
AA Agentic Index17.9Not measuredOnly GPT-5.4 Mini measured
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%24.3%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 index70
Reasoning benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
GPQA Diamond83.1%Not measuredOnly GPT-5.4 Mini measured
MMMU Pro (Vals AI)79.3%Not measuredOnly GPT-5.4 Mini measured
GPQA Diamond (Artificial Analysis run)87.5%57.8%GPT-5.4 Mini
Humanity's Last Exam (Artificial Analysis run)28.1%4.1%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 prompts14241364GPT-5.4 Mini
LMArena Text: expert14351342GPT-5.4 Mini
LMArena Text: hard prompts in English14201374GPT-5.4 Mini
LMArena Vision: diagrams12661155GPT-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 index20
Math benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
AIME95.6%Not measuredOnly GPT-5.4 Mini measured
AA Math IndexNot measured30.3Only Mistral Medium 3 measured
AIME 2025 (Artificial Analysis run)Not measured30.3%Only Mistral Medium 3 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: math14181353GPT-5.4 Mini
LMArena Text: mathematical work14291354GPT-5.4 Mini
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
MMLU Pro84.5%Not measuredOnly GPT-5.4 Mini measured
CaseLaw (Vals AI)51.7%Not measuredOnly GPT-5.4 Mini measured
CorpFin (Vals AI)60.9%Not measuredOnly GPT-5.4 Mini measured
TaxEval (Vals AI)71.2%Not measuredOnly GPT-5.4 Mini measured
MortgageTax (Vals AI)63.5%Not measuredOnly GPT-5.4 Mini measured
MMLU Pro (Artificial Analysis run)Not measured76.0%Only Mistral Medium 3 measured
SimpleQA Verified29.4%Not measuredOnly GPT-5.4 Mini measured
LMArena Text: science14171381GPT-5.4 Mini
LMArena Text: medicine and healthcare13951381GPT-5.4 Mini
LMArena Text: legal and government14141384GPT-5.4 Mini
LMArena Text: business and finance14181352GPT-5.4 Mini
Neither model has a result on the other 7 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
Design Arena: websitesNot measured1079Only Mistral Medium 3 measured
Design Arena: UI componentsNot measured1024Only Mistral Medium 3 measured
Design Arena: game devNot measured1018Only Mistral Medium 3 measured
Design Arena: data vizNot measured1034Only Mistral Medium 3 measured
Design Arena: 3DNot measured1084Only Mistral Medium 3 measured
Design Arena: all code categoriesNot measured1069Only Mistral Medium 3 measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index270
General benchmarks for GPT-5.4 Mini and Mistral Medium 3
BenchmarkGPT-5.4 MiniMistral Medium 3Leader
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%39.3%GPT-5.4 Mini
Long context reasoning (AA-LCR)77.0%31.3%GPT-5.4 Mini
DTBench80.0%62.3%GPT-5.4 Mini
LMCA40.8%Not measuredOnly GPT-5.4 Mini measured
LMArena Text14121370GPT-5.4 Mini
LMArena Text: instruction following14051338GPT-5.4 Mini
LMArena Text: creative writing13701343GPT-5.4 Mini
LMArena Vision12451157GPT-5.4 Mini
LMArena Text: English14121385GPT-5.4 Mini
LMArena Text: non-English14051353GPT-5.4 Mini
LMArena Text: Chinese14461374GPT-5.4 Mini
LMArena Text: German14081377GPT-5.4 Mini
LMArena Text: Japanese13751316GPT-5.4 Mini
LMArena Text: Korean13701304GPT-5.4 Mini
LMArena Text: French14411368GPT-5.4 Mini
LMArena Text: Spanish14051364GPT-5.4 Mini
LMArena Text: Russian14171359GPT-5.4 Mini
LMArena Text: Polish14151371GPT-5.4 Mini
LMArena Text: multi-turn14291384GPT-5.4 Mini
LMArena Text: longer queries14081360GPT-5.4 Mini
LMArena Text: writing and language13931352GPT-5.4 Mini
LMArena Text: entertainment and media13731335GPT-5.4 Mini
LMArena Vision: English12441172GPT-5.4 Mini
LMArena Vision: Chinese12861161GPT-5.4 Mini
LMArena Vision: reading text12531154GPT-5.4 Mini
LMArena Vision: humor12351145GPT-5.4 Mini
LMArena Vision: captioningNot measured1094Only Mistral Medium 3 measured
LMArena Vision: recognizing things12181141GPT-5.4 Mini
LMArena Vision: creative writing12221146GPT-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
BenchmarkGPT-5.4 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-5.4 Mini$0.0030Fits in one request
Mistral Medium 3$0.0014Fits in one request

Mistral Medium 3 costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
Mistral Medium 3$0.026Fits in one request

Mistral Medium 3 costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
Mistral Medium 3$0.100Exceeds 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 GPT-5.4 Mini and Mistral Medium 3
SpecificationOpenAI GPT-5.4 MiniMistral Medium 3
MakerOpenAIMistral AI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 17, 2026May 7, 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 for coding?

Only GPT-5.4 Mini has a coding score, 35.8 on the Vibe Coding Index; Mistral Medium 3 has none, so the two cannot be ranked on coding. Pick Mistral Medium 3 for output tokens 2.3x cheaper ($2.00 vs $4.50 per million).

Which is cheaper, GPT-5.4 Mini or Mistral Medium 3?

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; Mistral Medium 3 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?

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

How many benchmarks is the GPT-5.4 Mini vs Mistral Medium 3 comparison based on?

46 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's on 0. Where only one model has a result, the page says so instead of naming a winner.

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