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Claude Opus 4.6 vs GPT-5.4 Nano

Claude Opus 4.6 leads GPT-5.4 Nano on coding, 57.2 to 44.8 on the Vibe Coding Index, and GPT-5.4 Nano costs 20.0x less per output token ($1.25 vs $25.00 per million). Updated October 22, 2026; 74 benchmarks have a result for both.

Replace Claude Opus 4.6 Replace GPT-5.4 Nano
Claude Opus 4.6Anthropic
Coding
57.2
Overall
66.0
Output $/M
$25.00
72
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
2
vs boards won of 74 shared

Claude Opus 4.6 or GPT-5.4 Nano: which to pick

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 44.8 for GPT-5.4 Nano.

Pick GPT-5.4 Nano for output tokens 20.0x cheaper ($1.25 vs $25.00 per million) and a lower cost per solved task ($0.14 against $1.56).

Model AClaude Opus 4.6Anthropic57.2/1004 independent benchmarks$1.56 per solved taskModel BGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved task
Shared results
74
Claude Opus 4.6 only
36
GPT-5.4 Nano only
11
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
Claude Opus 4.6 57.2 from 4 benchmarks, GPT-5.4 Nano 44.8 from 2 benchmarks.
Widest category
Reasoning, 23.8 points apart on average over 15 shared benchmarks.
Widest single gap
ARC-AGI-2: Claude Opus 4.6 69.2% against GPT-5.4 Nano 5.7%, 63.5 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.6 $25.00 against GPT-5.4 Nano $1.25 per million output tokens, 20.0x apart.
Context window
Claude Opus 4.6 takes 1M 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 4.6BarsGPT-5.4 NanoTies
Coding70
Intelligence20
Agentic work10
Reasoning141
Math70
Knowledge120
General291
All shared boards722
CodingLike-for-likeSix of these boards feed the Vibe Coding Index70
Coding benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
SWE-bench Verified75.6%Not measuredOnly Claude Opus 4.6 measured
SWE-bench Multilingual72.0%Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev1547Not measuredOnly Claude Opus 4.6 measured
AA Coding IndexNot measured56.1Only GPT-5.4 Nano measured
LiveCodeBench (Vals AI)84.7%84.0%Claude Opus 4.6
SWE-bench Verified (Vals AI)78.2%69.8%Claude Opus 4.6
Vibe Code Bench (Vals AI)57.6%26.1%Claude Opus 4.6
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)48.5%42.4%Claude Opus 4.6
Terminal-Bench79.8%Not measuredOnly Claude Opus 4.6 measured
FrontierCode26.6%Not measuredOnly Claude Opus 4.6 measured
GSO-Bench41.2%Not measuredOnly Claude Opus 4.6 measured
WeirdML78.0%49.2%Claude Opus 4.6
Cybench93.0%Not measuredOnly Claude Opus 4.6 measured
ALE-BenchNot measured1004.5Only GPT-5.4 Nano measured
LMArena Text: coding15341404Claude Opus 4.6
LMArena Text: software and IT15271402Claude Opus 4.6
LMArena WebDev: React1539Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev: HTML1559Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev: from an image1543Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
AA Intelligence Index31.920.7Claude Opus 4.6
Epoch Capabilities Index155.7146.0Claude Opus 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
AA Agentic IndexNot measured16.0Only GPT-5.4 Nano measured
Design Arena: agents building web apps1206Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building full-stack apps1220Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building mobile apps1207Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building Android apps1197Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building games1212Not measuredOnly Claude Opus 4.6 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 Telecom92.1%76.0%Claude Opus 4.6
APEX-Agents46.3%Not measuredOnly Claude Opus 4.6 measured
METR time horizons78.9%Not measuredOnly Claude Opus 4.6 measured
Remote Labor Index4.2%Not measuredOnly Claude Opus 4.6 measured
DeepResearch Bench55.3%Not measuredOnly Claude Opus 4.6 measured
Vending-Bench 2$8,018Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 25 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index141
Reasoning benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
GPQA Diamond89.7%77.5%Claude Opus 4.6
MMMU Pro (Vals AI)83.9%73.6%Claude Opus 4.6
GPQA Diamond (Artificial Analysis run)89.6%81.7%Claude Opus 4.6
Humanity's Last Exam (Artificial Analysis run)39.9%28.3%Claude Opus 4.6
GPQA Diamond (Epoch AI run)90.5%78.5%Claude Opus 4.6
ARC-AGI94.0%51.5%Claude Opus 4.6
ARC-AGI-269.2%5.7%Claude Opus 4.6
SimpleBench67.6%Not measuredOnly Claude Opus 4.6 measured
Chess puzzles21.0%45.0%GPT-5.4 Nano
Mystery game puzzles25.0%9.0%Claude Opus 4.6
EBR-bench12.7%Not measuredOnly Claude Opus 4.6 measured
LMArena Text: hard prompts15251381Claude Opus 4.6
LMArena Text: expert15441396Claude Opus 4.6
LMArena Text: hard prompts in English15301387Claude Opus 4.6
LMArena Vision: diagrams13401210Claude Opus 4.6
LMArena Vision: homework13371225Claude Opus 4.6
Kagi LLM Benchmark83.6%39.7%Claude Opus 4.6
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index70
Math benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
AIME95.6%88.8%Claude Opus 4.6
OTIS Mock AIME94.4%87.8%Claude Opus 4.6
FrontierMath, tiers 1 to 366.0%44.9%Claude Opus 4.6
FrontierMath, tier 426.8%12.2%Claude Opus 4.6
ProofBench50.0%5.0%Claude Opus 4.6
LMArena Text: math15181405Claude Opus 4.6
LMArena Text: mathematical work15251409Claude Opus 4.6
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index120
Knowledge benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
MMLU Pro89.1%77.2%Claude Opus 4.6
LegalBench (Vals AI)85.3%77.9%Claude Opus 4.6
CaseLaw (Vals AI)62.1%51.9%Claude Opus 4.6
CorpFin (Vals AI)67.0%61.2%Claude Opus 4.6
TaxEval (Vals AI)76.0%67.4%Claude Opus 4.6
MortgageTax (Vals AI)68.5%59.1%Claude Opus 4.6
MedQA (Vals AI)95.4%Not measuredOnly Claude Opus 4.6 measured
MedCode (Vals AI)49.1%41.0%Claude Opus 4.6
SimpleQA Verified47.0%11.7%Claude Opus 4.6
LMArena Text: science15191374Claude Opus 4.6
LMArena Text: medicine and healthcare15041369Claude Opus 4.6
LMArena Text: legal and government15121368Claude Opus 4.6
LMArena Text: business and finance14971366Claude Opus 4.6
FACTS Benchmark Suite41.5%Not measuredOnly Claude Opus 4.6 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 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
Design Arena: websites1291Not measuredOnly Claude Opus 4.6 measured
Design Arena: UI components1281Not measuredOnly Claude Opus 4.6 measured
Design Arena: game dev1277Not measuredOnly Claude Opus 4.6 measured
Design Arena: data viz1279Not measuredOnly Claude Opus 4.6 measured
Design Arena: 3D1273Not measuredOnly Claude Opus 4.6 measured
Design Arena: all code categories1288Not measuredOnly Claude Opus 4.6 measured
Design Arena: SVG1227Not measuredOnly Claude Opus 4.6 measured
Design Arena: ASCII art1255Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index291
General benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-5.4 NanoLeader
SAGE (Vals AI)51.6%38.1%Claude Opus 4.6
MedScribe (Vals AI)86.7%77.1%Claude Opus 4.6
Vals Multimodal IndexNot measured47.6%Only GPT-5.4 Nano measured
IFBench53.1%75.9%GPT-5.4 Nano
Long context reasoning (AA-LCR)78.0%76.7%Claude Opus 4.6
DTBench91.2%80.3%Claude Opus 4.6
LMCA55.8%36.9%Claude Opus 4.6
CL-bench20.7%Not measuredOnly Claude Opus 4.6 measured
Furniture assembly28.3%Not measuredOnly Claude Opus 4.6 measured
CL-bench Life17.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text15011372Claude Opus 4.6
LMArena Text: instruction following15211362Claude Opus 4.6
LMArena Text: creative writing15051315Claude Opus 4.6
LMArena Vision13161196Claude Opus 4.6
LMArena Text: English15111381Claude Opus 4.6
LMArena Text: non-English14881359Claude Opus 4.6
LMArena Text: Chinese15511391Claude Opus 4.6
LMArena Text: German15001368Claude Opus 4.6
LMArena Text: Japanese14881343Claude Opus 4.6
LMArena Text: Korean14641321Claude Opus 4.6
LMArena Text: French15121395Claude Opus 4.6
LMArena Text: Spanish15101371Claude Opus 4.6
LMArena Text: Russian14971363Claude Opus 4.6
LMArena Text: Polish14991366Claude Opus 4.6
LMArena Text: multi-turn15111382Claude Opus 4.6
LMArena Text: longer queries15181365Claude Opus 4.6
LMArena Text: writing and language15021338Claude Opus 4.6
LMArena Text: entertainment and media14921325Claude Opus 4.6
LMArena Vision: English13241202Claude Opus 4.6
LMArena Vision: Chinese13701232Claude Opus 4.6
LMArena Vision: reading text13261204Claude Opus 4.6
LMArena Vision: humor13141161Claude Opus 4.6
LMArena Vision: recognizing things12741141Claude Opus 4.6
LMArena Vision: creative writing13311159Claude Opus 4.6
LMArena Document1507Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 4.6 and GPT-5.4 Nano
BenchmarkClaude Opus 4.6GPT-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 4.6$0.018Fits 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 4.6$0.325Fits 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 4.6$1.25Fits 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 Claude Opus 4.6 and GPT-5.4 Nano
SpecificationAnthropic Claude Opus 4.6OpenAI GPT-5.4 Nano
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedFebruary 4, 2026March 17, 2026
Context window1M400K
Input $/Mtok$5.00$0.20
Output $/Mtok$25.00$1.25
Coding index57.244.8
Independent measurements behind it42
Cost per solved task$1.56$0.14
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.6 better than GPT-5.4 Nano for coding?

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 44.8 for GPT-5.4 Nano. Pick GPT-5.4 Nano for output tokens 20.0x cheaper ($1.25 vs $25.00 per million) and a lower cost per solved task ($0.14 against $1.56).

Which is cheaper, Claude Opus 4.6 or GPT-5.4 Nano?

Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-5.4 Nano costs $0.20 and $1.25. Per solved SWE-bench Verified task, Claude Opus 4.6 costs $1.56 and GPT-5.4 Nano $0.14.

Which has the bigger context window, Claude Opus 4.6 or GPT-5.4 Nano?

Claude Opus 4.6, with 1M tokens against 400K.

How many benchmarks is the Claude Opus 4.6 vs GPT-5.4 Nano comparison based on?

74 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.6's coding index rests on 4 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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