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Claude Opus 4.1 vs GPT-5.4 Nano

Claude Opus 4.1 leads GPT-5.4 Nano on the Artificial Analysis Intelligence Index, 22.8 to 20.7, and GPT-5.4 Nano costs 60.0x less per output token ($1.25 vs $75.00 per million). Updated October 22, 2026; 49 benchmarks have a result for both.

Replace Claude Opus 4.1 Replace GPT-5.4 Nano
Claude Opus 4.1Anthropic
Coding
No data
Overall
50.2
Output $/M
$75.00
37
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
12
vs boards won of 49 shared

Claude Opus 4.1 or GPT-5.4 Nano: which to pick

Only GPT-5.4 Nano has a coding score, 44.8 on the Vibe Coding Index; Claude Opus 4.1 has none, so the two cannot be ranked on coding.

Pick Claude Opus 4.1 for work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AClaude Opus 4.1AnthropicNot benchmarked1 independent benchmarkNo cost per solved taskModel BGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved task
Shared results
49
Claude Opus 4.1 only
24
GPT-5.4 Nano only
36
Like-for-like categories
6 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
Claude Opus 4.1 not benchmarked, GPT-5.4 Nano 44.8 from 2 benchmarks.
Widest category
Math, 13.3 points apart on average over 6 shared benchmarks.
Widest single gap
FrontierMath, tiers 1 to 3: Claude Opus 4.1 12.6% against GPT-5.4 Nano 44.9%, 32.3 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.1 $75.00 against GPT-5.4 Nano $1.25 per million output tokens, 60.0x apart.
Context window
Claude Opus 4.1 takes 200K tokens, GPT-5.4 Nano 400K.

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
CategoryClaude Opus 4.1BarsGPT-5.4 NanoTies
Coding22
Intelligence11
Reasoning52
Math24
Knowledge90
General183
All shared boards3712
CodingLike-for-likeSix of these boards feed the Vibe Coding Index22
Coding benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
LMArena WebDev1390Not measuredOnly Claude Opus 4.1 measured
AA Coding IndexNot measured56.1Only GPT-5.4 Nano measured
LiveCodeBench (Vals AI)66.5%84.0%GPT-5.4 Nano
SWE-bench Verified (Vals AI)Not measured69.8%Only GPT-5.4 Nano measured
Vibe Code Bench (Vals AI)Not measured26.1%Only GPT-5.4 Nano measured
Code migration (Vals AI)Not measured14.5%Only GPT-5.4 Nano measured
Terminal-Bench 2.1 (Vals AI)Not measured41.6%Only GPT-5.4 Nano measured
SciCodeNot measured47.2%Only GPT-5.4 Nano measured
Terminal-Bench Hard (Artificial Analysis run)Not measured42.4%Only GPT-5.4 Nano measured
Terminal-Bench38.0%Not measuredOnly Claude Opus 4.1 measured
WeirdML45.9%49.2%GPT-5.4 Nano
Cybench42.0%Not measuredOnly Claude Opus 4.1 measured
ALE-BenchNot measured1004.5Only GPT-5.4 Nano measured
LMArena Text: coding14791404Claude Opus 4.1
LMArena Text: software and IT14561402Claude Opus 4.1
LMArena WebDev: HTML1399Not measuredOnly Claude Opus 4.1 measured
SciCode4.6%Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 22 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11
Intelligence benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
AA Intelligence Index22.820.7Claude Opus 4.1
Epoch Capabilities Index144.1146.0GPT-5.4 Nano
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Agentic work benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
AA Agentic IndexNot measured16.0Only GPT-5.4 Nano measured
Finance Agent (Vals AI)Not measured38.2%Only GPT-5.4 Nano measured
Tax Agent Bench (Vals AI)Not measured5.0%Only GPT-5.4 Nano measured
Legal Research Bench (Vals AI)Not measured6.3%Only GPT-5.4 Nano measured
Excel Modeling Benchmark (Vals AI)Not measured44.8%Only GPT-5.4 Nano measured
τ²-Bench TelecomNot measured76.0%Only GPT-5.4 Nano measured
METR time horizons66.8%Not measuredOnly Claude Opus 4.1 measured
GDPval43.6%Not measuredOnly Claude Opus 4.1 measured
DeepResearch Bench48.3%Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 32 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index52
Reasoning benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
GPQA Diamond76.3%77.5%GPT-5.4 Nano
MMMU Pro (Vals AI)77.5%73.6%Claude Opus 4.1
GPQA Diamond (Artificial Analysis run)Not measured81.7%Only GPT-5.4 Nano measured
Humanity's Last Exam (Artificial Analysis run)Not measured28.3%Only GPT-5.4 Nano measured
GPQA Diamond (Epoch AI run)77.3%78.5%GPT-5.4 Nano
ARC-AGINot measured51.5%Only GPT-5.4 Nano measured
ARC-AGI-2Not measured5.7%Only GPT-5.4 Nano measured
SimpleBench60.0%Not measuredOnly Claude Opus 4.1 measured
Chess puzzlesNot measured45.0%Only GPT-5.4 Nano measured
Mystery game puzzles21.0%9.0%Claude Opus 4.1
EBR-bench7.9%Not measuredOnly Claude Opus 4.1 measured
VPCT35.0%Not measuredOnly Claude Opus 4.1 measured
LMArena Text: hard prompts14421381Claude Opus 4.1
LMArena Text: expert14381396Claude Opus 4.1
LMArena Text: hard prompts in English14511387Claude Opus 4.1
LMArena Vision: diagramsNot measured1210Only GPT-5.4 Nano measured
LMArena Vision: homeworkNot measured1225Only GPT-5.4 Nano measured
Kagi LLM BenchmarkNot measured39.7%Only GPT-5.4 Nano measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index24
Math benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
AIME78.2%88.8%GPT-5.4 Nano
MATH 500 (Vals AI)95.4%Not measuredOnly Claude Opus 4.1 measured
MGSM (Vals AI)94.4%Not measuredOnly Claude Opus 4.1 measured
OTIS Mock AIME68.9%87.8%GPT-5.4 Nano
FrontierMath, tiers 1 to 312.6%44.9%GPT-5.4 Nano
FrontierMath, tier 42.4%12.2%GPT-5.4 Nano
ProofBenchNot measured5.0%Only GPT-5.4 Nano measured
LMArena Text: math14311405Claude Opus 4.1
LMArena Text: mathematical work14341409Claude Opus 4.1
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
Knowledge benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
MMLU Pro87.9%77.2%Claude Opus 4.1
LegalBench (Vals AI)83.5%77.9%Claude Opus 4.1
CaseLaw (Vals AI)Not measured51.9%Only GPT-5.4 Nano measured
CorpFin (Vals AI)Not measured61.2%Only GPT-5.4 Nano measured
TaxEval (Vals AI)73.7%67.4%Claude Opus 4.1
MortgageTax (Vals AI)61.1%59.1%Claude Opus 4.1
MedQA (Vals AI)93.6%Not measuredOnly Claude Opus 4.1 measured
MedCode (Vals AI)47.2%41.0%Claude Opus 4.1
SimpleQA VerifiedNot measured11.7%Only GPT-5.4 Nano measured
LMArena Text: science14221374Claude Opus 4.1
LMArena Text: medicine and healthcare14161369Claude Opus 4.1
LMArena Text: legal and government14211368Claude Opus 4.1
LMArena Text: business and finance14061366Claude Opus 4.1
FACTS Benchmark Suite40.4%Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 4 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
Design Arena: websites1176Not measuredOnly Claude Opus 4.1 measured
Design Arena: UI components1162Not measuredOnly Claude Opus 4.1 measured
Design Arena: game dev1171Not measuredOnly Claude Opus 4.1 measured
Design Arena: data viz1166Not measuredOnly Claude Opus 4.1 measured
Design Arena: 3D1152Not measuredOnly Claude Opus 4.1 measured
Design Arena: all code categories1170Not measuredOnly Claude Opus 4.1 measured
Design Arena: SVG1152Not measuredOnly Claude Opus 4.1 measured
Design Arena: ASCII art1167Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index183
General benchmarks for Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-5.4 NanoLeader
SAGE (Vals AI)31.4%38.1%GPT-5.4 Nano
MedScribe (Vals AI)73.9%77.1%GPT-5.4 Nano
Vals Multimodal IndexNot measured47.6%Only GPT-5.4 Nano measured
IFBenchNot measured75.9%Only GPT-5.4 Nano measured
Long context reasoning (AA-LCR)Not measured76.7%Only GPT-5.4 Nano measured
DTBench80.0%80.3%GPT-5.4 Nano
LMCA37.1%36.9%Claude Opus 4.1
Creative writing (Lech Mazur)84.7%Not measuredOnly Claude Opus 4.1 measured
LMArena Text14191372Claude Opus 4.1
LMArena Text: instruction following14351362Claude Opus 4.1
LMArena Text: creative writing14121315Claude Opus 4.1
LMArena VisionNot measured1196Only GPT-5.4 Nano measured
LMArena Text: English14331381Claude Opus 4.1
LMArena Text: non-English14051359Claude Opus 4.1
LMArena Text: Chinese14271391Claude Opus 4.1
LMArena Text: German14131368Claude Opus 4.1
LMArena Text: Japanese13771343Claude Opus 4.1
LMArena Text: Korean13811321Claude Opus 4.1
LMArena Text: French14331395Claude Opus 4.1
LMArena Text: Spanish14481371Claude Opus 4.1
LMArena Text: Russian14221363Claude Opus 4.1
LMArena Text: Polish14131366Claude Opus 4.1
LMArena Text: multi-turn14441382Claude Opus 4.1
LMArena Text: longer queries14551365Claude Opus 4.1
LMArena Text: writing and language14181338Claude Opus 4.1
LMArena Text: entertainment and media13981325Claude Opus 4.1
LMArena Vision: EnglishNot measured1202Only GPT-5.4 Nano measured
LMArena Vision: ChineseNot measured1232Only GPT-5.4 Nano measured
LMArena Vision: reading textNot measured1204Only GPT-5.4 Nano measured
LMArena Vision: humorNot measured1161Only GPT-5.4 Nano measured
LMArena Vision: recognizing thingsNot measured1141Only GPT-5.4 Nano measured
LMArena Vision: creative writingNot measured1159Only GPT-5.4 Nano measured
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 Claude Opus 4.1 and GPT-5.4 Nano
BenchmarkClaude Opus 4.1GPT-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

Claude Opus 4.1$0.052Fits 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

Claude Opus 4.1$0.975Fits 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

Claude Opus 4.1$3.75Exceeds the context window
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 Claude Opus 4.1 and GPT-5.4 Nano
SpecificationAnthropic Claude Opus 4.1OpenAI GPT-5.4 Nano
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedAugust 5, 2025March 17, 2026
Context window200K400K
Input $/Mtok$15.00$0.20
Output $/Mtok$75.00$1.25
Coding indexNot benchmarked44.8
Independent measurements behind it12
Cost per solved taskNot computable$0.14
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.1 better than GPT-5.4 Nano for coding?

Only GPT-5.4 Nano has a coding score, 44.8 on the Vibe Coding Index; Claude Opus 4.1 has none, so the two cannot be ranked on coding. Pick Claude Opus 4.1 for work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Which is cheaper, Claude Opus 4.1 or GPT-5.4 Nano?

Claude Opus 4.1 costs $15.00 per million input tokens and $75.00 per million output tokens; GPT-5.4 Nano costs $0.20 and $1.25. Cost per solved task is known for GPT-5.4 Nano only.

Which has the bigger context window, Claude Opus 4.1 or GPT-5.4 Nano?

GPT-5.4 Nano, with 400K tokens against 200K.

How many benchmarks is the Claude Opus 4.1 vs GPT-5.4 Nano comparison based on?

49 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.1's coding index rests on 1 independent benchmark 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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