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Anthropic Claude Opus 4.6

  • Anthropic
  • Released February 4, 2026
  • No public weights listed
  • 1M context

As of October 20, 2026, Anthropic Claude Opus 4.6 ranks #47 of 213 models overall with 31.9 on the Artificial Analysis Intelligence Index. Its strongest category is knowledge, where it ranks #14 of 147. Anthropic Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens. It was released on February 4, 2026.

Its output price ranks 327 of 349 priced models, counting from the cheapest.

  • Coding index 66.9 Partial, 2 benchmarks
  • Cost per solved task $1.56 One SWE-bench Verified task, solved
  • Output, per million tokens $25.00 327 of 349 from the cheapest
  • Input, per million tokens $5.00 OpenRouter list price
  • Context window 1M Tokens per request

About and specs

Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective...

API model id anthropic/claude-opus-4.6
  • Tool callingListed
  • Structured outputsListed
  • JSON modeListed
  • Reasoning modeListed
  • Web searchNot listed
Takes in
Text, Images, Files
Gives back
Text
Context window
1M tokens
Max output
128K tokens
Knowledge cutoff
May 2025, per Anthropic model documentation
Cached input $/Mtok
$0.50
Cache write $/Mtok
$6.25
Reasoning $/Mtok
Not priced apart
Web search, per request
$0.01
Tokenizer
Claude
Requests moderated
Yes, by the provider
Withdrawn on
No date announced
Parameters
Not published
Downloads, all time
No public weights
Training compute
No estimate published
Output speed
Not measured
Time to first token
Not measured
Speed on OpenRouter
34 tokens/s via Anthropic, 30-minute median
First token on OpenRouter
1.8 s via Anthropic, 30-minute median

Benchmarks: 109 of 190 measured

The tick on a coding bar is the median of every model measured on it. Outside coding, the place is this model's rank on that board. A board that never ran the model says so.

Where it stands

Full leaderboard
#47of 213 overall 31.9AA Intelligence Index

Measured in 5 of 6 categories. A place counts only the models measured on that board.

Coding index

66.9
  • Aider polyglot Not measured
  • SWE-bench Verified 75.6% 76 of 100
  • LiveBench coding Not measured
  • LMArena WebDev Elo, scaled from 1200 to 1900 1547 Elo 50 of 100

The index averages only the coding benchmarks that have a result; the others are skipped, never filled in. How it is weighted

Other public boards

All rankings

Best placings

  1. LMArena Vision: English1#1 of 85
  2. METR time horizons1#1 of 21
  3. DeepResearch Bench1#1 of 20
  4. SWE-bench Multilingual1#1 of 11

Lowest placings

  1. FrontierCode#33 of 41
  2. Furniture assembly#24 of 33
  3. EBR-bench#19 of 26

Coding15 of 34 boards

9 more coding boards

Not measured on SWE-bench Lite, SWE-bench (full test set), SWE-bench Multimodal, AA Coding Index, Terminal-Bench 4 (Vals AI), Code migration (Vals AI), ProgramBench (Vals AI), IOI (Vals AI), Terminal-Bench 2.1 (Vals AI), SWE-bench Multimodal (Vals AI), Vibe Code Bench 1-100 (Vals AI), SkillsBench (Vals AI), CyberBench (Vals AI), LiveCodeBench (Artificial Analysis run), SciCode, DeepSWE, FrontierSWE, MirrorCode, ALE-Bench

Intelligence2 of 2 boards

Agentic work11 of 39 boards

5 more agentic work boards

Not measured on AA Agentic Index, Design Arena: agents building Godot games, Design Arena: HTML slides, Design Arena: PowerPoint slides, Design Arena: spreadsheets, LiveBench research, LiveBench browser, LiveBench long agentic, SREBench (Vals AI), Finance Agent (Vals AI), Tax Agent Bench (Vals AI), Legal Research Bench (Vals AI), Harvey's Legal Agent Benchmark (Vals AI), Excel Modeling Benchmark (Vals AI), BioMysteryBench (Vals AI), Terminal-Bench-Science (Vals AI), Vals Science Index, Time Horizon Index (Vals AI), CUA-bench (Vals AI), Robo-bench (Vals AI), GDPval, OSWorld 2.0, BALROG, PostTrainBench, TheAgentCompany, OSWorld, SpireClimb, LMArena Search

Reasoning17 of 21 boards

11 more reasoning boards

Not measured on LiveBench reasoning, MysteryMechanism (Vals AI), VPCT, BIG-Bench Hard

Math7 of 13 boards

1 more math boards

Not measured on MATH 500 (Vals AI), MGSM (Vals AI), AA Math Index, AIME 2025 (Artificial Analysis run), MATH level 5, GSM8K

Knowledge13 of 17 boards

7 more knowledge boards

Not measured on MMLU Pro (Artificial Analysis run), MMLU, GeoBench, AI2 Reasoning Challenge

Web design8 of 9 boards

2 more web design boards

Not measured on LiveBench design

General34 of 46 boards

28 more general boards

Not measured on Vals Index, LiveBench data analysis, Public Benefits Bench (Vals AI), Vals Multimodal Index, Fiction.LiveBench, Creative writing (Lech Mazur), Surface Evolver Bench, ExploitBench, HellaSwag, WinoGrande, PIQA, LMArena Vision: captioning

Image generation0 of 5 boards

Not measured on Design Arena: images, Design Arena: graphic design, Design Arena: logos, LMArena Text to Image, LMArena Image Edit

Public boards shown as published (Vals AI, Artificial Analysis, Design Arena) and kept out of the coding index. Each links to its source on the benchmark page.

All 190 benchmarks as a table
Benchmark results for Anthropic Claude Opus 4.6
BenchmarkResultIndex weight
Aider polyglotCoding Not measured 35%
SWE-bench VerifiedCoding 75.6% 30%
SWE-bench LiteCoding Not measured Not in index
SWE-bench (full test set)Coding Not measured Not in index
SWE-bench MultimodalCoding Not measured Not in index
SWE-bench MultilingualCoding 72.0% Not in index
LiveBench codingCoding Not measured 20%
LMArena WebDevCoding 1547 15%
Vals IndexGeneral Not measured Not in index
GPQA DiamondReasoning 89.7% Not in index
AIMEMath 95.6% Not in index
MMLU ProKnowledge 89.1% Not in index
AA Intelligence IndexIntelligence 31.9 Not in index
AA Coding IndexCoding Not measured Not in index
AA Agentic IndexAgentic work Not measured Not in index
Design Arena: websitesWeb design 1291 Not in index
Design Arena: UI componentsWeb design 1285 Not in index
Design Arena: game devWeb design 1277 Not in index
Design Arena: data vizWeb design 1279 Not in index
Design Arena: 3DWeb design 1274 Not in index
Design Arena: all code categoriesWeb design 1289 Not in index
Design Arena: SVGWeb design 1227 Not in index
Design Arena: ASCII artWeb design 1255 Not in index
Design Arena: agents building web appsAgentic work 1206 Not in index
Design Arena: agents building full-stack appsAgentic work 1220 Not in index
Design Arena: agents building mobile appsAgentic work 1206 Not in index
Design Arena: agents building Android appsAgentic work 1214 Not in index
Design Arena: agents building Godot gamesAgentic work Not measured Not in index
Design Arena: agents building gamesAgentic work 1212 Not in index
Design Arena: HTML slidesAgentic work Not measured Not in index
Design Arena: PowerPoint slidesAgentic work Not measured Not in index
Design Arena: spreadsheetsAgentic work Not measured Not in index
Design Arena: imagesImage generation Not measured Not in index
Design Arena: graphic designImage generation Not measured Not in index
Design Arena: logosImage generation Not measured Not in index
LiveBench reasoningReasoning Not measured Not in index
LiveBench data analysisGeneral Not measured Not in index
LiveBench researchAgentic work Not measured Not in index
LiveBench browserAgentic work Not measured Not in index
LiveBench long agenticAgentic work Not measured Not in index
LiveBench designWeb design Not measured Not in index
LiveCodeBench (Vals AI)Coding 84.7% Not in index
SWE-bench Verified (Vals AI)Coding 78.2% Not in index
Terminal-Bench 4 (Vals AI)Coding Not measured Not in index
Vibe Code Bench (Vals AI)Coding 57.6% Not in index
Code migration (Vals AI)Coding Not measured Not in index
ProgramBench (Vals AI)Coding Not measured Not in index
SREBench (Vals AI)Agentic work Not measured Not in index
IOI (Vals AI)Coding Not measured Not in index
Terminal-Bench 2.1 (Vals AI)Coding Not measured Not in index
SWE-bench Multimodal (Vals AI)Coding Not measured Not in index
Vibe Code Bench 1-100 (Vals AI)Coding Not measured Not in index
SkillsBench (Vals AI)Coding Not measured Not in index
CyberBench (Vals AI)Coding Not measured Not in index
Finance Agent (Vals AI)Agentic work Not measured Not in index
Tax Agent Bench (Vals AI)Agentic work Not measured Not in index
Legal Research Bench (Vals AI)Agentic work Not measured Not in index
Harvey's Legal Agent Benchmark (Vals AI)Agentic work Not measured Not in index
Excel Modeling Benchmark (Vals AI)Agentic work Not measured Not in index
BioMysteryBench (Vals AI)Agentic work Not measured Not in index
Terminal-Bench-Science (Vals AI)Agentic work Not measured Not in index
Vals Science IndexAgentic work Not measured Not in index
Time Horizon Index (Vals AI)Agentic work Not measured Not in index
CUA-bench (Vals AI)Agentic work Not measured Not in index
Robo-bench (Vals AI)Agentic work Not measured Not in index
Public Benefits Bench (Vals AI)General Not measured Not in index
MysteryMechanism (Vals AI)Reasoning Not measured Not in index
MMMU Pro (Vals AI)Reasoning 83.9% Not in index
MATH 500 (Vals AI)Math Not measured Not in index
MGSM (Vals AI)Math Not measured Not in index
SAGE (Vals AI)General 51.6% Not in index
LegalBench (Vals AI)Knowledge 85.3% Not in index
CaseLaw (Vals AI)Knowledge 62.1% Not in index
CorpFin (Vals AI)Knowledge 67.0% Not in index
TaxEval (Vals AI)Knowledge 76.0% Not in index
MortgageTax (Vals AI)Knowledge 68.5% Not in index
MedQA (Vals AI)Knowledge 95.4% Not in index
MedCode (Vals AI)Knowledge 49.1% Not in index
MedScribe (Vals AI)General 86.7% Not in index
Vals Multimodal IndexGeneral Not measured Not in index
AA Math IndexMath Not measured Not in index
GPQA Diamond (Artificial Analysis run)Reasoning 89.6% Not in index
Humanity's Last Exam (Artificial Analysis run)Reasoning 39.9% Not in index
MMLU Pro (Artificial Analysis run)Knowledge Not measured Not in index
LiveCodeBench (Artificial Analysis run)Coding Not measured Not in index
SciCodeCoding Not measured Not in index
Terminal-Bench Hard (Artificial Analysis run)Coding 48.5% Not in index
IFBenchGeneral 53.1% Not in index
Long context reasoning (AA-LCR)General 78.0% Not in index
τ²-Bench TelecomAgentic work 92.1% Not in index
AIME 2025 (Artificial Analysis run)Math Not measured Not in index
Terminal-BenchCoding 79.8% Not in index
DeepSWECoding Not measured Not in index
FrontierCodeCoding 26.6% Not in index
FrontierSWECoding Not measured Not in index
GSO-BenchCoding 41.2% Not in index
WeirdMLCoding 78.0% Not in index
MirrorCodeCoding Not measured Not in index
APEX-AgentsAgentic work 46.3% Not in index
METR time horizonsAgentic work 78.9% Not in index
Remote Labor IndexAgentic work 4.2% Not in index
GDPvalAgentic work Not measured Not in index
OSWorld 2.0Agentic work Not measured Not in index
BALROGAgentic work Not measured Not in index
DeepResearch BenchAgentic work 55.3% Not in index
PostTrainBenchAgentic work Not measured Not in index
GPQA Diamond (Epoch AI run)Reasoning 90.5% Not in index
ARC-AGIReasoning 94.0% Not in index
ARC-AGI-2Reasoning 69.2% Not in index
Humanity's Last ExamReasoning 34.4% Not in index
SimpleBenchReasoning 67.6% Not in index
Chess puzzlesReasoning 21.0% Not in index
Mystery game puzzlesReasoning 25.0% Not in index
EBR-benchReasoning 12.7% Not in index
OTIS Mock AIMEMath 94.4% Not in index
FrontierMath, tiers 1 to 3Math 66.0% Not in index
FrontierMath, tier 4Math 26.8% Not in index
ProofBenchMath 50.0% Not in index
MATH level 5Math Not measured Not in index
GSM8KMath Not measured Not in index
SimpleQA VerifiedKnowledge 47.0% Not in index
MMLUKnowledge Not measured Not in index
GeoBenchKnowledge Not measured Not in index
DTBenchGeneral 91.2% Not in index
LMCAGeneral 55.8% Not in index
Fiction.LiveBenchGeneral Not measured Not in index
Creative writing (Lech Mazur)General Not measured Not in index
CL-benchGeneral 20.7% Not in index
Surface Evolver BenchGeneral Not measured Not in index
Furniture assemblyGeneral 28.3% Not in index
ExploitBenchGeneral Not measured Not in index
CybenchCoding 93.0% Not in index
TheAgentCompanyAgentic work Not measured Not in index
OSWorldAgentic work Not measured Not in index
SpireClimbAgentic work Not measured Not in index
VPCTReasoning Not measured Not in index
BIG-Bench HardReasoning Not measured Not in index
AI2 Reasoning ChallengeKnowledge Not measured Not in index
HellaSwagGeneral Not measured Not in index
WinoGrandeGeneral Not measured Not in index
PIQAGeneral Not measured Not in index
CL-bench LifeGeneral 17.0% Not in index
ALE-BenchCoding Not measured Not in index
Vending-Bench 2Agentic work $8,018 Not in index
Epoch Capabilities IndexIntelligence 155.3 Not in index
LMArena TextGeneral 1502 Not in index
LMArena Text: codingCoding 1535 Not in index
LMArena Text: hard promptsReasoning 1525 Not in index
LMArena Text: mathMath 1519 Not in index
LMArena Text: instruction followingGeneral 1522 Not in index
LMArena Text: creative writingGeneral 1505 Not in index
LMArena VisionGeneral 1316 Not in index
LMArena Text: EnglishGeneral 1512 Not in index
LMArena Text: non-EnglishGeneral 1488 Not in index
LMArena Text: ChineseGeneral 1550 Not in index
LMArena Text: GermanGeneral 1502 Not in index
LMArena Text: JapaneseGeneral 1488 Not in index
LMArena Text: KoreanGeneral 1465 Not in index
LMArena Text: FrenchGeneral 1513 Not in index
LMArena Text: SpanishGeneral 1510 Not in index
LMArena Text: RussianGeneral 1496 Not in index
LMArena Text: PolishGeneral 1497 Not in index
LMArena Text: multi-turnGeneral 1512 Not in index
LMArena Text: longer queriesGeneral 1518 Not in index
LMArena Text: expertReasoning 1545 Not in index
LMArena Text: hard prompts in EnglishReasoning 1531 Not in index
LMArena Text: software and ITCoding 1528 Not in index
LMArena Text: mathematical workMath 1526 Not in index
LMArena Text: scienceKnowledge 1520 Not in index
LMArena Text: medicine and healthcareKnowledge 1505 Not in index
LMArena Text: legal and governmentKnowledge 1512 Not in index
LMArena Text: business and financeKnowledge 1498 Not in index
LMArena Text: writing and languageGeneral 1503 Not in index
LMArena Text: entertainment and mediaGeneral 1492 Not in index
LMArena WebDev: ReactCoding 1539 Not in index
LMArena WebDev: HTMLCoding 1559 Not in index
LMArena WebDev: from an imageCoding 1543 Not in index
LMArena Vision: EnglishGeneral 1324 Not in index
LMArena Vision: ChineseGeneral 1370 Not in index
LMArena Vision: reading textGeneral 1326 Not in index
LMArena Vision: diagramsReasoning 1340 Not in index
LMArena Vision: homeworkReasoning 1337 Not in index
LMArena Vision: humorGeneral 1314 Not in index
LMArena Vision: captioningGeneral Not measured Not in index
LMArena Vision: recognizing thingsGeneral 1274 Not in index
LMArena Vision: creative writingGeneral 1331 Not in index
LMArena SearchAgentic work Not measured Not in index
LMArena DocumentGeneral 1507 Not in index
LMArena Text to ImageImage generation Not measured Not in index
LMArena Image EditImage generation Not measured Not in index

What it costs

A list price says what a token costs. The cost per solved task says what a working answer costs, which is the number that decides.

Output price against the market

Claude Opus 4.6 pricing
$0.0112Dashed line: median $1.80, log scale$600.00
$25.00 per million output tokens is cheaper than 5% of the 344 paid models in the catalog.

Cost per solved task

How it is computed
$1.22one attempt, Vals AI 78.2%tasks solved $1.56per solved task

Nearly as good as Claude Opus 4.6, for less

What the boards say about its runs

Beside a result, many boards publish what the run cost, how long it took, the tokens it spent or the votes behind a rating. Each figure as its board printed it, one board per row.

What each board publishes about the runs behind Anthropic: Claude Opus 4.6's results
BoardResultWhat the run costAlso published
SWE-bench Verified 75.6% $0.5515 per attempt Nothing else
SWE-bench Multilingual 72.0% $0.663 per attempt Nothing else
SWE-bench Verified (Vals AI) 78.2% $1.22 per test Duration, as printed 5m 51s
Vibe Code Bench (Vals AI) 57.6% $8.69 per test Duration, as printed 21m 19s
WeirdML 78.0% $5.7794 per run Median lines of code 169
ProofBench 50.0% $2.7036 per test Time per proof 1h 06m
LMArena WebDev 1547 Elo Not published Votes 19,383 · Interval (±) ±5.5
GPQA Diamond 89.7% Not published Latency, as printed 5m 19s
AIME 95.6% Not published Latency, as printed 4m 56s
MMLU Pro 89.1% Not published Latency, as printed 49 s
Design Arena: websites 1291 Elo Not published Battles 14,720
Design Arena: UI components 1285 Elo Not published Battles 2,319
64 more boards
What each board publishes about the runs behind Anthropic: Claude Opus 4.6's results, continued
Design Arena: game dev 1277 Elo Not published Battles 2,745
Design Arena: data viz 1279 Elo Not published Battles 1,919
Design Arena: 3D 1274 Elo Not published Battles 5,862
Design Arena: all code categories 1289 Elo Not published Battles 27,406
Design Arena: SVG 1227 Elo Not published Battles 3,987
Design Arena: ASCII art 1255 Elo Not published Battles 412
Design Arena: agents building web apps 1206 Elo Not published Battles 4,135
Design Arena: agents building full-stack apps 1220 Elo Not published Battles 2,517
Design Arena: agents building mobile apps 1206 Elo Not published Battles 2,143
Design Arena: agents building Android apps 1214 Elo Not published Battles 778
Design Arena: agents building games 1212 Elo Not published Battles 219
LiveCodeBench (Vals AI) 84.7% Not published Latency, as printed 5m 24s
MMMU Pro (Vals AI) 83.9% Not published Latency, as printed 1m 59s
SAGE (Vals AI) 51.6% Not published Latency, as printed 2m 41s
LegalBench (Vals AI) 85.3% Not published Latency, as printed 3.8 s
CaseLaw (Vals AI) 62.1% Not published Latency, as printed 32 s
CorpFin (Vals AI) 67.0% Not published Latency, as printed 21 s
TaxEval (Vals AI) 76.0% Not published Latency, as printed 1m 19s
MortgageTax (Vals AI) 68.5% Not published Latency, as printed 27 s
MedQA (Vals AI) 95.4% Not published Latency, as printed 30 s
MedCode (Vals AI) 49.1% Not published Latency, as printed 2m 36s
MedScribe (Vals AI) 86.7% Not published Latency, as printed 54 s
APEX-Agents 46.3% Not published Mean score 61.8%
LMArena Text 1502 Elo Not published Votes 81,394 · Interval (±) ±3.3
LMArena Text: coding 1535 Elo Not published Votes 23,838 · Interval (±) ±5.1
LMArena Text: hard prompts 1525 Elo Not published Votes 51,834 · Interval (±) ±4.0
LMArena Text: math 1519 Elo Not published Votes 4,186 · Interval (±) ±9.6
LMArena Text: instruction following 1522 Elo Not published Votes 26,220 · Interval (±) ±5.0
LMArena Text: creative writing 1505 Elo Not published Votes 14,950 · Interval (±) ±6.2
LMArena Vision 1316 Elo Not published Votes 22,286 · Interval (±) ±6.4
LMArena Text: English 1512 Elo Not published Votes 35,808 · Interval (±) ±4.4
LMArena Text: non-English 1488 Elo Not published Votes 45,580 · Interval (±) ±4.0
LMArena Text: Chinese 1550 Elo Not published Votes 5,649 · Interval (±) ±8.8
LMArena Text: German 1502 Elo Not published Votes 1,292 · Interval (±) ±17.4
LMArena Text: Japanese 1488 Elo Not published Votes 930 · Interval (±) ±21.3
LMArena Text: Korean 1465 Elo Not published Votes 1,541 · Interval (±) ±16.8
LMArena Text: French 1513 Elo Not published Votes 2,652 · Interval (±) ±13.3
LMArena Text: Spanish 1510 Elo Not published Votes 2,844 · Interval (±) ±12.4
LMArena Text: Russian 1496 Elo Not published Votes 9,363 · Interval (±) ±6.9
LMArena Text: Polish 1497 Elo Not published Votes 1,535 · Interval (±) ±15.3
LMArena Text: multi-turn 1512 Elo Not published Votes 13,816 · Interval (±) ±6.2
LMArena Text: longer queries 1518 Elo Not published Votes 34,498 · Interval (±) ±4.8
LMArena Text: expert 1545 Elo Not published Votes 7,403 · Interval (±) ±7.8
LMArena Text: hard prompts in English 1531 Elo Not published Votes 23,259 · Interval (±) ±5.2
LMArena Text: software and IT 1528 Elo Not published Votes 33,580 · Interval (±) ±4.5
LMArena Text: mathematical work 1526 Elo Not published Votes 4,247 · Interval (±) ±9.9
LMArena Text: science 1520 Elo Not published Votes 13,562 · Interval (±) ±6.1
LMArena Text: medicine and healthcare 1505 Elo Not published Votes 6,131 · Interval (±) ±8.4
LMArena Text: legal and government 1512 Elo Not published Votes 6,644 · Interval (±) ±8.1
LMArena Text: business and finance 1498 Elo Not published Votes 15,952 · Interval (±) ±5.8
LMArena Text: writing and language 1503 Elo Not published Votes 21,041 · Interval (±) ±5.3
LMArena Text: entertainment and media 1492 Elo Not published Votes 18,420 · Interval (±) ±5.7
LMArena WebDev: React 1539 Elo Not published Votes 15,128 · Interval (±) ±6.1
LMArena WebDev: HTML 1559 Elo Not published Votes 2,462 · Interval (±) ±13.3
LMArena WebDev: from an image 1543 Elo Not published Votes 7,938 · Interval (±) ±8.9
LMArena Vision: English 1324 Elo Not published Votes 9,235 · Interval (±) ±8.7
LMArena Vision: Chinese 1370 Elo Not published Votes 1,681 · Interval (±) ±17.1
LMArena Vision: reading text 1326 Elo Not published Votes 19,407 · Interval (±) ±6.3
LMArena Vision: diagrams 1340 Elo Not published Votes 7,249 · Interval (±) ±8.7
LMArena Vision: homework 1337 Elo Not published Votes 2,845 · Interval (±) ±11.9
LMArena Vision: humor 1314 Elo Not published Votes 1,026 · Interval (±) ±19.4
LMArena Vision: recognizing things 1274 Elo Not published Votes 189 · Interval (±) ±38.4
LMArena Vision: creative writing 1331 Elo Not published Votes 1,407 · Interval (±) ±16.8
LMArena Document 1507 Elo Not published Votes 27,929 · Interval (±) ±6.4

On these lists

Compare with models of a similar score

All 135 comparisons for Claude Opus 4.6