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GPT-5.4 Nano vs Mistral Small 3.1 24B

Mistral Small 3.1 24B costs 2.3x less per output token than GPT-5.4 Nano ($0.555 vs $1.25 per million). Updated October 22, 2026; 37 benchmarks have a result for both.

Replace GPT-5.4 Nano Replace Mistral Small 3.1 24B
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
36
Mistral Small 3.1 24BMistral AI
Coding
No data
Overall
No data
Output $/M
$0.555
1
vs boards won of 37 shared

GPT-5.4 Nano or Mistral Small 3.1 24B: which to pick

Only GPT-5.4 Nano has a coding score, 44.8 on the Vibe Coding Index; Mistral Small 3.1 24B has none, so the two cannot be ranked on coding.

Pick Mistral Small 3.1 24B for output tokens 2.3x cheaper ($0.555 vs $1.25 per million) and work measured by LMArena Vision: recognizing things, where it leads.

Model AGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved taskModel BMistral Small 3.1 24BMistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
37
GPT-5.4 Nano only
48
Mistral Small 3.1 24B only
1
Like-for-like categories
5 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 Nano 44.8 from 2 benchmarks, Mistral Small 3.1 24B not benchmarked.
Widest category
Math, 23.5 points apart on average over 2 shared benchmarks.
Widest single gap
LMArena Text: math: GPT-5.4 Nano 1405 against Mistral Small 3.1 24B 1261, 24.1 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Nano $1.25 against Mistral Small 3.1 24B $0.555 per million output tokens, 2.3x apart.
Context window
GPT-5.4 Nano takes 400K tokens, Mistral Small 3.1 24B 128K.

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 NanoBarsMistral Small 3.1 24BTies
Coding20
Reasoning50
Math20
Knowledge40
General231
All shared boards361
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
AA Coding Index56.1Not measuredOnly GPT-5.4 Nano measured
LiveCodeBench (Vals AI)84.0%Not measuredOnly GPT-5.4 Nano measured
SWE-bench Verified (Vals AI)69.8%Not measuredOnly GPT-5.4 Nano measured
Vibe Code Bench (Vals AI)26.1%Not measuredOnly GPT-5.4 Nano measured
Code migration (Vals AI)14.5%Not measuredOnly GPT-5.4 Nano measured
Terminal-Bench 2.1 (Vals AI)41.6%Not measuredOnly GPT-5.4 Nano measured
SciCode47.2%Not measuredOnly GPT-5.4 Nano measured
Terminal-Bench Hard (Artificial Analysis run)42.4%Not measuredOnly GPT-5.4 Nano measured
WeirdML49.2%Not measuredOnly GPT-5.4 Nano measured
ALE-Bench1004.5Not measuredOnly GPT-5.4 Nano measured
LMArena Text: coding14041309GPT-5.4 Nano
LMArena Text: software and IT14021301GPT-5.4 Nano
Neither model has a result on the other 27 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Intelligence benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
AA Intelligence Index20.7Not measuredOnly GPT-5.4 Nano measured
Epoch Capabilities Index146.0Not measuredOnly GPT-5.4 Nano measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Agentic work benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
AA Agentic Index16.0Not measuredOnly GPT-5.4 Nano measured
Finance Agent (Vals AI)38.2%Not measuredOnly GPT-5.4 Nano measured
Tax Agent Bench (Vals AI)5.0%Not measuredOnly GPT-5.4 Nano measured
Legal Research Bench (Vals AI)6.3%Not measuredOnly GPT-5.4 Nano measured
Excel Modeling Benchmark (Vals AI)44.8%Not measuredOnly GPT-5.4 Nano measured
τ²-Bench Telecom76.0%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 35 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
GPQA Diamond77.5%Not measuredOnly GPT-5.4 Nano measured
MMMU Pro (Vals AI)73.6%Not measuredOnly GPT-5.4 Nano measured
GPQA Diamond (Artificial Analysis run)81.7%Not measuredOnly GPT-5.4 Nano measured
Humanity's Last Exam (Artificial Analysis run)28.3%Not measuredOnly GPT-5.4 Nano measured
GPQA Diamond (Epoch AI run)78.5%Not measuredOnly GPT-5.4 Nano measured
ARC-AGI51.5%Not measuredOnly GPT-5.4 Nano measured
ARC-AGI-25.7%Not measuredOnly GPT-5.4 Nano measured
Chess puzzles45.0%Not measuredOnly GPT-5.4 Nano measured
Mystery game puzzles9.0%Not measuredOnly GPT-5.4 Nano measured
LMArena Text: hard prompts13811278GPT-5.4 Nano
LMArena Text: expert13961257GPT-5.4 Nano
LMArena Text: hard prompts in English13871290GPT-5.4 Nano
LMArena Vision: diagrams12101119GPT-5.4 Nano
LMArena Vision: homework12251158GPT-5.4 Nano
Kagi LLM Benchmark39.7%Not measuredOnly GPT-5.4 Nano 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 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
AIME88.8%Not measuredOnly GPT-5.4 Nano measured
OTIS Mock AIME87.8%Not measuredOnly GPT-5.4 Nano measured
FrontierMath, tiers 1 to 344.9%Not measuredOnly GPT-5.4 Nano measured
FrontierMath, tier 412.2%Not measuredOnly GPT-5.4 Nano measured
ProofBench5.0%Not measuredOnly GPT-5.4 Nano measured
LMArena Text: math14051261GPT-5.4 Nano
LMArena Text: mathematical work14091271GPT-5.4 Nano
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
MMLU Pro77.2%Not measuredOnly GPT-5.4 Nano measured
LegalBench (Vals AI)77.9%Not measuredOnly GPT-5.4 Nano measured
CaseLaw (Vals AI)51.9%Not measuredOnly GPT-5.4 Nano measured
CorpFin (Vals AI)61.2%Not measuredOnly GPT-5.4 Nano measured
TaxEval (Vals AI)67.4%Not measuredOnly GPT-5.4 Nano measured
MortgageTax (Vals AI)59.1%Not measuredOnly GPT-5.4 Nano measured
MedCode (Vals AI)41.0%Not measuredOnly GPT-5.4 Nano measured
SimpleQA Verified11.7%Not measuredOnly GPT-5.4 Nano measured
LMArena Text: science13741265GPT-5.4 Nano
LMArena Text: medicine and healthcare13691267GPT-5.4 Nano
LMArena Text: legal and government13681271GPT-5.4 Nano
LMArena Text: business and finance13661257GPT-5.4 Nano
Neither model has a result on the other 6 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index231
General benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
SAGE (Vals AI)38.1%Not measuredOnly GPT-5.4 Nano measured
MedScribe (Vals AI)77.1%Not measuredOnly GPT-5.4 Nano measured
Vals Multimodal Index47.6%Not measuredOnly GPT-5.4 Nano measured
IFBench75.9%Not measuredOnly GPT-5.4 Nano measured
Long context reasoning (AA-LCR)76.7%Not measuredOnly GPT-5.4 Nano measured
DTBench80.3%Not measuredOnly GPT-5.4 Nano measured
LMCA36.9%Not measuredOnly GPT-5.4 Nano measured
LMArena Text13721277GPT-5.4 Nano
LMArena Text: instruction following13621263GPT-5.4 Nano
LMArena Text: creative writing13151252GPT-5.4 Nano
LMArena Vision11961136GPT-5.4 Nano
LMArena Text: English13811295GPT-5.4 Nano
LMArena Text: non-English13591255GPT-5.4 Nano
LMArena Text: Chinese13911253GPT-5.4 Nano
LMArena Text: German13681266GPT-5.4 Nano
LMArena Text: Japanese13431208GPT-5.4 Nano
LMArena Text: Korean13211207GPT-5.4 Nano
LMArena Text: French13951273GPT-5.4 Nano
LMArena Text: Spanish13711284GPT-5.4 Nano
LMArena Text: Russian13631263GPT-5.4 Nano
LMArena Text: Polish13661242GPT-5.4 Nano
LMArena Text: multi-turn13821270GPT-5.4 Nano
LMArena Text: longer queries13651299GPT-5.4 Nano
LMArena Text: writing and language13381268GPT-5.4 Nano
LMArena Text: entertainment and media13251250GPT-5.4 Nano
LMArena Vision: English12021157GPT-5.4 Nano
LMArena Vision: Chinese12321155GPT-5.4 Nano
LMArena Vision: reading text12041132GPT-5.4 Nano
LMArena Vision: humor11611142GPT-5.4 Nano
LMArena Vision: captioningNot measured1153Only Mistral Small 3.1 24B measured
LMArena Vision: recognizing things11411155Mistral Small 3.1 24B
LMArena Vision: creative writing11591123GPT-5.4 Nano
Neither model has a result on the other 14 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5.4 Nano and Mistral Small 3.1 24B
BenchmarkGPT-5.4 NanoMistral Small 3.1 24BLeader
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 Nano$0.0008Fits in one request
Mistral Small 3.1 24B$0.0006Fits in one request

Mistral Small 3.1 24B costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Nano$0.014Fits in one request
Mistral Small 3.1 24B$0.019Fits in one request

GPT-5.4 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Nano$0.052Fits in one request
Mistral Small 3.1 24B$0.076Exceeds the context window

GPT-5.4 Nano 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 Nano and Mistral Small 3.1 24B
SpecificationOpenAI GPT-5.4 NanoMistral Small 3.1 24B
MakerOpenAIMistral AI
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026March 17, 2025
Context window400K128K
Input $/Mtok$0.20$0.351
Output $/Mtok$1.25$0.555
Coding index44.8Not benchmarked
Independent measurements behind it20
Cost per solved task$0.14Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Nano better than Mistral Small 3.1 24B for coding?

Only GPT-5.4 Nano has a coding score, 44.8 on the Vibe Coding Index; Mistral Small 3.1 24B has none, so the two cannot be ranked on coding. Pick Mistral Small 3.1 24B for output tokens 2.3x cheaper ($0.555 vs $1.25 per million) and work measured by LMArena Vision: recognizing things, where it leads.

Which is cheaper, GPT-5.4 Nano or Mistral Small 3.1 24B?

GPT-5.4 Nano costs $0.20 per million input tokens and $1.25 per million output tokens; Mistral Small 3.1 24B costs $0.351 and $0.555. Cost per solved task is known for GPT-5.4 Nano only.

Which has the bigger context window, GPT-5.4 Nano or Mistral Small 3.1 24B?

GPT-5.4 Nano, with 400K tokens against 128K.

How many benchmarks is the GPT-5.4 Nano vs Mistral Small 3.1 24B comparison based on?

37 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Nano's coding index rests on 2 independent benchmarks and Mistral Small 3.1 24B's on 0. Where only one model has a result, the page says so instead of naming a winner.

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