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GPT-5.4 Mini vs GPT-5.4 Nano

GPT-5.4 Nano leads GPT-5.4 Mini on coding, 44.8 to 35.8 on the Vibe Coding Index, and GPT-5.4 Nano costs 3.6x less per output token ($1.25 vs $4.50 per million). Updated October 22, 2026; 82 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace GPT-5.4 Nano
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
71
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
10
vs boards won of 82 shared, 1 tied

GPT-5.4 Mini or GPT-5.4 Nano: which to pick

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini, though on 2 benchmarks against 5.

Pick GPT-5.4 Mini for work measured by SWE-bench Verified (Vals AI) or Vibe Code Bench (Vals AI), where it leads.

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved task
Shared results
82
GPT-5.4 Mini only
7
GPT-5.4 Nano only
3
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, GPT-5.4 Nano 44.8 from 2 benchmarks.
Widest category
Reasoning, 7.7 points apart on average over 15 shared benchmarks.
Widest single gap
Chess puzzles: GPT-5.4 Mini 23.0% against GPT-5.4 Nano 45.0%, 22.0 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against GPT-5.4 Nano $1.25 per million output tokens, 3.6x apart.
Context window
Both take 400K tokens.

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 MiniBarsGPT-5.4 NanoTies
Coding921 tie
Intelligence20
Agentic work60
Reasoning123
Math61
Knowledge82
General282
All shared boards71101 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index92
Coding benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
LMArena WebDev1397Not measuredOnly GPT-5.4 Mini measured
AA Coding Index56.156.1Tie
LiveCodeBench (Vals AI)81.5%84.0%GPT-5.4 Nano
SWE-bench Verified (Vals AI)73.0%69.8%GPT-5.4 Mini
Terminal-Bench 4 (Vals AI)2.5%Not measuredOnly GPT-5.4 Mini measured
Vibe Code Bench (Vals AI)48.0%26.1%GPT-5.4 Mini
Code migration (Vals AI)12.9%14.5%GPT-5.4 Nano
ProgramBench (Vals AI)0.0%Not measuredOnly GPT-5.4 Mini measured
Terminal-Bench 2.1 (Vals AI)54.7%41.6%GPT-5.4 Mini
SciCode52.1%47.2%GPT-5.4 Mini
Terminal-Bench Hard (Artificial Analysis run)52.3%42.4%GPT-5.4 Mini
FrontierCode27.0%Not measuredOnly GPT-5.4 Mini measured
WeirdML60.3%49.2%GPT-5.4 Mini
ALE-Bench1188.61004.5GPT-5.4 Mini
LMArena Text: coding14381404GPT-5.4 Mini
LMArena Text: software and IT14361402GPT-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 21 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
AA Intelligence Index24.120.7GPT-5.4 Mini
Epoch Capabilities Index148.7146.0GPT-5.4 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index60
Agentic work benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
AA Agentic Index17.916.0GPT-5.4 Mini
Finance Agent (Vals AI)45.4%38.2%GPT-5.4 Mini
Tax Agent Bench (Vals AI)8.8%5.0%GPT-5.4 Mini
Legal Research Bench (Vals AI)12.5%6.3%GPT-5.4 Mini
Excel Modeling Benchmark (Vals AI)45.4%44.8%GPT-5.4 Mini
τ²-Bench Telecom83.3%76.0%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 index123
Reasoning benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
GPQA Diamond83.1%77.5%GPT-5.4 Mini
MMMU Pro (Vals AI)79.3%73.6%GPT-5.4 Mini
GPQA Diamond (Artificial Analysis run)87.5%81.7%GPT-5.4 Mini
Humanity's Last Exam (Artificial Analysis run)28.1%28.3%GPT-5.4 Nano
GPQA Diamond (Epoch AI run)86.9%78.5%GPT-5.4 Mini
ARC-AGI63.7%51.5%GPT-5.4 Mini
ARC-AGI-218.9%5.7%GPT-5.4 Mini
Chess puzzles23.0%45.0%GPT-5.4 Nano
Mystery game puzzles11.0%9.0%GPT-5.4 Mini
LMArena Text: hard prompts14241381GPT-5.4 Mini
LMArena Text: expert14351396GPT-5.4 Mini
LMArena Text: hard prompts in English14201387GPT-5.4 Mini
LMArena Vision: diagrams12661210GPT-5.4 Mini
LMArena Vision: homework12851225GPT-5.4 Mini
Kagi LLM Benchmark37.9%39.7%GPT-5.4 Nano
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index61
Math benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
AIME95.6%88.8%GPT-5.4 Mini
OTIS Mock AIME88.9%87.8%GPT-5.4 Mini
FrontierMath, tiers 1 to 351.2%44.9%GPT-5.4 Mini
FrontierMath, tier 49.8%12.2%GPT-5.4 Nano
ProofBench21.0%5.0%GPT-5.4 Mini
LMArena Text: math14181405GPT-5.4 Mini
LMArena Text: mathematical work14291409GPT-5.4 Mini
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index82
Knowledge benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
MMLU Pro84.5%77.2%GPT-5.4 Mini
LegalBench (Vals AI)Not measured77.9%Only GPT-5.4 Nano measured
CaseLaw (Vals AI)51.7%51.9%GPT-5.4 Nano
CorpFin (Vals AI)60.9%61.2%GPT-5.4 Nano
TaxEval (Vals AI)71.2%67.4%GPT-5.4 Mini
MortgageTax (Vals AI)63.5%59.1%GPT-5.4 Mini
MedCode (Vals AI)Not measured41.0%Only GPT-5.4 Nano measured
SimpleQA Verified29.4%11.7%GPT-5.4 Mini
LMArena Text: science14171374GPT-5.4 Mini
LMArena Text: medicine and healthcare13951369GPT-5.4 Mini
LMArena Text: legal and government14141368GPT-5.4 Mini
LMArena Text: business and finance14181366GPT-5.4 Mini
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 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index282
General benchmarks for GPT-5.4 Mini and GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
SAGE (Vals AI)50.8%38.1%GPT-5.4 Mini
MedScribe (Vals AI)Not measured77.1%Only GPT-5.4 Nano measured
Vals Multimodal Index54.2%47.6%GPT-5.4 Mini
IFBench73.3%75.9%GPT-5.4 Nano
Long context reasoning (AA-LCR)77.0%76.7%GPT-5.4 Mini
DTBench80.0%80.3%GPT-5.4 Nano
LMCA40.8%36.9%GPT-5.4 Mini
LMArena Text14121372GPT-5.4 Mini
LMArena Text: instruction following14051362GPT-5.4 Mini
LMArena Text: creative writing13701315GPT-5.4 Mini
LMArena Vision12451196GPT-5.4 Mini
LMArena Text: English14121381GPT-5.4 Mini
LMArena Text: non-English14051359GPT-5.4 Mini
LMArena Text: Chinese14461391GPT-5.4 Mini
LMArena Text: German14081368GPT-5.4 Mini
LMArena Text: Japanese13751343GPT-5.4 Mini
LMArena Text: Korean13701321GPT-5.4 Mini
LMArena Text: French14411395GPT-5.4 Mini
LMArena Text: Spanish14051371GPT-5.4 Mini
LMArena Text: Russian14171363GPT-5.4 Mini
LMArena Text: Polish14151366GPT-5.4 Mini
LMArena Text: multi-turn14291382GPT-5.4 Mini
LMArena Text: longer queries14081365GPT-5.4 Mini
LMArena Text: writing and language13931338GPT-5.4 Mini
LMArena Text: entertainment and media13731325GPT-5.4 Mini
LMArena Vision: English12441202GPT-5.4 Mini
LMArena Vision: Chinese12861232GPT-5.4 Mini
LMArena Vision: reading text12531204GPT-5.4 Mini
LMArena Vision: humor12351161GPT-5.4 Mini
LMArena Vision: recognizing things12181141GPT-5.4 Mini
LMArena Vision: creative writing12221159GPT-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 GPT-5.4 Nano
BenchmarkGPT-5.4 MiniGPT-5.4 NanoLeader
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
GPT-5.4 Nano$0.0008Fits in one request

GPT-5.4 Nano costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
GPT-5.4 Nano$0.014Fits in one request

GPT-5.4 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
GPT-5.4 Nano$0.052Fits in one request

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 Mini and GPT-5.4 Nano
SpecificationOpenAI GPT-5.4 MiniOpenAI GPT-5.4 Nano
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 17, 2026March 17, 2026
Context window400K400K
Input $/Mtok$0.75$0.20
Output $/Mtok$4.50$1.25
Coding index35.844.8
Independent measurements behind it52
Cost per solved task$0.70$0.14
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Mini better than GPT-5.4 Nano for coding?

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini, though on 2 benchmarks against 5. Pick GPT-5.4 Mini for work measured by SWE-bench Verified (Vals AI) or Vibe Code Bench (Vals AI), where it leads.

Which is cheaper, GPT-5.4 Mini or GPT-5.4 Nano?

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; GPT-5.4 Nano costs $0.20 and $1.25. Per solved SWE-bench Verified task, GPT-5.4 Mini costs $0.70 and GPT-5.4 Nano $0.14.

Which has the bigger context window, GPT-5.4 Mini or GPT-5.4 Nano?

Neither: both take 400K tokens.

How many benchmarks is the GPT-5.4 Mini vs GPT-5.4 Nano comparison based on?

82 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 GPT-5.4 Nano's on 2. Where only one model has a result, the page says so instead of naming a winner.

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