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GPT-5.4 Nano vs Mistral Small 3

GPT-5.4 Nano leads Mistral Small 3 on the Artificial Analysis Intelligence Index, 20.7 to 6.7, and Mistral Small 3 costs 15.6x less per output token ($0.08 vs $1.25 per million). Updated October 23, 2026; 32 benchmarks have a result for both.

Replace GPT-5.4 Nano Replace Mistral Small 3
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.8
Output $/M
$1.25
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 Nano or Mistral Small 3: which to pick

Only GPT-5.4 Nano has a coding score, 44.8 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 15.6x cheaper ($0.08 vs $1.25 per million).

Model AGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved taskModel BMistral Small 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
32
GPT-5.4 Nano only
53
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 Nano 44.8 from 2 benchmarks, Mistral Small 3 not benchmarked.
Widest category
Agentic work, 56.4 points apart on average over 1 shared benchmark.
Widest single gap
Long context reasoning (AA-LCR): GPT-5.4 Nano 76.7% against Mistral Small 3 0.0%, 76.7 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Nano $1.25 against Mistral Small 3 $0.08 per million output tokens, 15.6x apart.
Context window
GPT-5.4 Nano 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 NanoBarsMistral 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 Nano and Mistral Small 3
BenchmarkGPT-5.4 NanoMistral Small 3Leader
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
LiveCodeBench (Artificial Analysis run)Not measured25.2%Only Mistral Small 3 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: coding14051246GPT-5.4 Nano
LMArena Text: software and IT14031248GPT-5.4 Nano
Neither model has a result on the other 30 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for GPT-5.4 Nano and Mistral Small 3
BenchmarkGPT-5.4 NanoMistral Small 3Leader
AA Intelligence Index20.76.7GPT-5.4 Nano
Epoch Capabilities Index146.0Not measuredOnly GPT-5.4 Nano measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GPT-5.4 Nano and Mistral Small 3
BenchmarkGPT-5.4 NanoMistral Small 3Leader
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%19.6%GPT-5.4 Nano
Neither model has a result on the other 36 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
BenchmarkGPT-5.4 NanoMistral Small 3Leader
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%46.2%GPT-5.4 Nano
Humanity's Last Exam (Artificial Analysis run)28.3%3.8%GPT-5.4 Nano
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 prompts13811233GPT-5.4 Nano
LMArena Text: expert13961202GPT-5.4 Nano
LMArena Text: hard prompts in English13871243GPT-5.4 Nano
LMArena Vision: diagrams1210Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: homework1225Not measuredOnly GPT-5.4 Nano measured
Kagi LLM Benchmark39.7%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 8 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
BenchmarkGPT-5.4 NanoMistral Small 3Leader
AIME88.8%Not measuredOnly GPT-5.4 Nano 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 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: math14061240GPT-5.4 Nano
LMArena Text: mathematical work14091243GPT-5.4 Nano
Neither model has a result on the other 5 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
BenchmarkGPT-5.4 NanoMistral Small 3Leader
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
MMLU Pro (Artificial Analysis run)Not measured65.2%Only Mistral Small 3 measured
SimpleQA Verified11.7%Not measuredOnly GPT-5.4 Nano measured
LMArena Text: science13741235GPT-5.4 Nano
LMArena Text: medicine and healthcare13691215GPT-5.4 Nano
LMArena Text: legal and government13681219GPT-5.4 Nano
LMArena Text: business and finance13661205GPT-5.4 Nano
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 Nano and Mistral Small 3
BenchmarkGPT-5.4 NanoMistral 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 Nano and Mistral Small 3
BenchmarkGPT-5.4 NanoMistral Small 3Leader
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%26.4%GPT-5.4 Nano
Long context reasoning (AA-LCR)76.7%0.0%GPT-5.4 Nano
DTBench80.3%Not measuredOnly GPT-5.4 Nano measured
LMCA36.9%Not measuredOnly GPT-5.4 Nano measured
LMArena Text13721234GPT-5.4 Nano
LMArena Text: instruction following13621214GPT-5.4 Nano
LMArena Text: creative writing13141194GPT-5.4 Nano
LMArena Vision1196Not measuredOnly GPT-5.4 Nano measured
LMArena Text: English13811256GPT-5.4 Nano
LMArena Text: non-English13601198GPT-5.4 Nano
LMArena Text: Chinese13911204GPT-5.4 Nano
LMArena Text: German13681211GPT-5.4 Nano
LMArena Text: Japanese13431111GPT-5.4 Nano
LMArena Text: Korean13201188GPT-5.4 Nano
LMArena Text: French13951203GPT-5.4 Nano
LMArena Text: Spanish1371Not measuredOnly GPT-5.4 Nano measured
LMArena Text: Russian13621216GPT-5.4 Nano
LMArena Text: Polish1366Not measuredOnly GPT-5.4 Nano measured
LMArena Text: multi-turn13821217GPT-5.4 Nano
LMArena Text: longer queries13661246GPT-5.4 Nano
LMArena Text: writing and language13381214GPT-5.4 Nano
LMArena Text: entertainment and media13241184GPT-5.4 Nano
LMArena Vision: English1202Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: Chinese1232Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: reading text1204Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: humor1161Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: recognizing things1141Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: creative writing1159Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 17 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
BenchmarkGPT-5.4 NanoMistral 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 Nano$0.0008Fits 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 Nano$0.014Fits 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 Nano$0.052Fits 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 Nano and Mistral Small 3
SpecificationOpenAI GPT-5.4 NanoMistral Small 3
MakerOpenAIMistral AI
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026January 30, 2025
Context window400K33K
Input $/Mtok$0.20$0.05
Output $/Mtok$1.25$0.08
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 for coding?

Only GPT-5.4 Nano has a coding score, 44.8 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 15.6x cheaper ($0.08 vs $1.25 per million).

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

GPT-5.4 Nano costs $0.20 per million input tokens and $1.25 per million output tokens; Mistral Small 3 costs $0.05 and $0.08. 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?

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

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

32 benchmarks have a result for both models as of October 23, 2026. GPT-5.4 Nano's coding index rests on 2 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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