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GPT-5.4 Mini vs Mistral Small 3

GPT-5.4 Mini leads Mistral Small 3 on the Artificial Analysis Intelligence Index, 24.1 to 6.7, and Mistral Small 3 costs 56.3x less per output token ($0.08 vs $4.50 per million). Updated October 22, 2026; 32 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace Mistral Small 3
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
32
Mistral Small 3Mistral AI
Coding
No data
Overall
No data
Output $/M
$0.08
0
vs boards won of 32 shared

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

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

Pick Mistral Small 3 for output tokens 56.3x cheaper ($0.08 vs $4.50 per million).

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BMistral Small 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
32
GPT-5.4 Mini only
57
Mistral Small 3 only
4
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 Small 3 not benchmarked.
Widest category
Agentic work, 63.7 points apart on average over 1 shared benchmark.
Widest single gap
Long context reasoning (AA-LCR): GPT-5.4 Mini 77.0% against Mistral Small 3 0.0%, 77.0 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against Mistral Small 3 $0.08 per million output tokens, 56.3x apart.
Context window
GPT-5.4 Mini takes 400K tokens, Mistral Small 3 33K.

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 Small 3Ties
Coding20
Intelligence10
Agentic work10
Reasoning50
Math20
Knowledge40
General170
All shared boards320
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for GPT-5.4 Mini and Mistral Small 3
BenchmarkGPT-5.4 MiniMistral Small 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 measured25.2%Only Mistral Small 3 measured
SciCode52.1%Not measuredOnly GPT-5.4 Mini measured
Terminal-Bench Hard (Artificial Analysis run)52.3%Not measuredOnly GPT-5.4 Mini measured
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: coding14381246GPT-5.4 Mini
LMArena Text: software and IT14361248GPT-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 index10
Intelligence benchmarks for GPT-5.4 Mini and Mistral Small 3
BenchmarkGPT-5.4 MiniMistral Small 3Leader
AA Intelligence Index24.16.7GPT-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 index10
Agentic work benchmarks for GPT-5.4 Mini and Mistral Small 3
BenchmarkGPT-5.4 MiniMistral Small 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%19.6%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 index50
Reasoning benchmarks for GPT-5.4 Mini and Mistral Small 3
BenchmarkGPT-5.4 MiniMistral Small 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%46.2%GPT-5.4 Mini
Humanity's Last Exam (Artificial Analysis run)28.1%3.8%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 prompts14241233GPT-5.4 Mini
LMArena Text: expert14351202GPT-5.4 Mini
LMArena Text: hard prompts in English14201243GPT-5.4 Mini
LMArena Vision: diagrams1266Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: homework1285Not measuredOnly GPT-5.4 Mini measured
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 Small 3
BenchmarkGPT-5.4 MiniMistral Small 3Leader
AIME95.6%Not measuredOnly GPT-5.4 Mini measured
AA Math IndexNot measured4.3Only Mistral Small 3 measured
AIME 2025 (Artificial Analysis run)Not measured4.3%Only Mistral Small 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: math14181240GPT-5.4 Mini
LMArena Text: mathematical work14291243GPT-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 Small 3
BenchmarkGPT-5.4 MiniMistral Small 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 measured65.2%Only Mistral Small 3 measured
SimpleQA Verified29.4%Not measuredOnly GPT-5.4 Mini measured
LMArena Text: science14171235GPT-5.4 Mini
LMArena Text: medicine and healthcare13951215GPT-5.4 Mini
LMArena Text: legal and government14141219GPT-5.4 Mini
LMArena Text: business and finance14181205GPT-5.4 Mini
Neither model has a result on the other 7 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for GPT-5.4 Mini and Mistral Small 3
BenchmarkGPT-5.4 MiniMistral Small 3Leader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index170
General benchmarks for GPT-5.4 Mini and Mistral Small 3
BenchmarkGPT-5.4 MiniMistral Small 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%26.4%GPT-5.4 Mini
Long context reasoning (AA-LCR)77.0%0.0%GPT-5.4 Mini
DTBench80.0%Not measuredOnly GPT-5.4 Mini measured
LMCA40.8%Not measuredOnly GPT-5.4 Mini measured
LMArena Text14121234GPT-5.4 Mini
LMArena Text: instruction following14051214GPT-5.4 Mini
LMArena Text: creative writing13701194GPT-5.4 Mini
LMArena Vision1245Not measuredOnly GPT-5.4 Mini measured
LMArena Text: English14121256GPT-5.4 Mini
LMArena Text: non-English14051198GPT-5.4 Mini
LMArena Text: Chinese14461204GPT-5.4 Mini
LMArena Text: German14081211GPT-5.4 Mini
LMArena Text: Japanese13751111GPT-5.4 Mini
LMArena Text: Korean13701188GPT-5.4 Mini
LMArena Text: French14411204GPT-5.4 Mini
LMArena Text: Spanish1405Not measuredOnly GPT-5.4 Mini measured
LMArena Text: Russian14171216GPT-5.4 Mini
LMArena Text: Polish1415Not measuredOnly GPT-5.4 Mini measured
LMArena Text: multi-turn14291217GPT-5.4 Mini
LMArena Text: longer queries14081246GPT-5.4 Mini
LMArena Text: writing and language13931214GPT-5.4 Mini
LMArena Text: entertainment and media13731184GPT-5.4 Mini
LMArena Vision: English1244Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: Chinese1286Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: reading text1253Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: humor1235Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: recognizing things1218Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: creative writing1222Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 16 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 Small 3
BenchmarkGPT-5.4 MiniMistral Small 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 Small 3$0.0001Fits in one request

Mistral Small 3 costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
Mistral Small 3$0.0027Exceeds the context window

Mistral Small 3 costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
Mistral Small 3$0.011Exceeds the context window

Mistral Small 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 Small 3
SpecificationOpenAI GPT-5.4 MiniMistral Small 3
MakerOpenAIMistral AI
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026January 30, 2025
Context window400K33K
Input $/Mtok$0.75$0.05
Output $/Mtok$4.50$0.08
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 Small 3 for coding?

Only GPT-5.4 Mini has a coding score, 35.8 on the Vibe Coding Index; Mistral Small 3 has none, so the two cannot be ranked on coding. Pick Mistral Small 3 for output tokens 56.3x cheaper ($0.08 vs $4.50 per million).

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

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; Mistral Small 3 costs $0.05 and $0.08. Cost per solved task is known for GPT-5.4 Mini only.

Which has the bigger context window, GPT-5.4 Mini or Mistral Small 3?

GPT-5.4 Mini, with 400K tokens against 33K.

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

32 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Mini's coding index rests on 5 independent benchmarks and Mistral Small 3's on 0. Where only one model has a result, the page says so instead of naming a winner.

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