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Anthropic Claude Opus 5.5

  • Anthropic
  • Released September 22, 2026
  • No public weights listed
  • 1M context

As of October 20, 2026, Anthropic Claude Opus 5.5 ranks #1 of 213 models overall with 57.6 on the Artificial Analysis Intelligence Index. Its strongest category is coding, where it ranks #1 of 136. Anthropic Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 per million output tokens. It was released on September 22, 2026.

Its output price ranks 323 of 349 priced models, counting from the cheapest.

  • Coding index 92.2 Partial, 2 benchmarks
  • Cost per solved task Not computable No published attempt cost
  • Output, per million tokens $20.00 323 of 349 from the cheapest
  • Input, per million tokens $4.00 OpenRouter list price
  • Context window 1M Tokens per request
New model

Claude Opus 5.5 launch tracker

Listed on OpenRouter September 22, 2026, 28 days before our data. Results so far on 105 of 190 public boards; this page updates every day as boards publish.

About and specs

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

API model id anthropic/claude-opus-5.5
  • 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
June 2026, per Anthropic model documentation
Cached input $/Mtok
$0.20
Cache write $/Mtok
$5.00
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Withdrawn on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
96 tokens/s, Max effort
Time to first token
662 s, Max effort
Speed on OpenRouter
68 tokens/s via Anthropic, 30-minute median
First token on OpenRouter
4.0 s via Anthropic, 30-minute median

Benchmarks: 105 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.

Coding index

92.2
  • Aider polyglot Not measured
  • SWE-bench Verified Not measured
  • LiveBench coding 96.3% 96 of 100
  • LMArena WebDev Elo, scaled from 1200 to 1900 1807 Elo 87 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

Coding19 of 34 boards

13 more coding boards

Not measured on SWE-bench Lite, SWE-bench (full test set), SWE-bench Multimodal, SWE-bench Multilingual, AA Coding Index, LiveCodeBench (Vals AI), SWE-bench Verified (Vals AI), SkillsBench (Vals AI), LiveCodeBench (Artificial Analysis run), Terminal-Bench Hard (Artificial Analysis run), Terminal-Bench, DeepSWE, GSO-Bench, WeirdML, Cybench

Intelligence2 of 2 boards

Agentic work22 of 39 boards

16 more agentic work boards

Not measured on AA Agentic Index, Design Arena: agents building full-stack apps, Design Arena: agents building Android apps, Design Arena: agents building Godot games, Design Arena: agents building games, Design Arena: HTML slides, Design Arena: PowerPoint slides, Design Arena: spreadsheets, τ²-Bench Telecom, METR time horizons, GDPval, OSWorld 2.0, BALROG, DeepResearch Bench, PostTrainBench, TheAgentCompany, OSWorld

Reasoning14 of 21 boards

8 more reasoning boards

Not measured on GPQA Diamond, MMMU Pro (Vals AI), GPQA Diamond (Artificial Analysis run), Humanity's Last Exam, SimpleBench, VPCT, BIG-Bench Hard

Math6 of 13 boards

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

Knowledge6 of 17 boards

Not measured on MMLU Pro, LegalBench (Vals AI), CaseLaw (Vals AI), CorpFin (Vals AI), TaxEval (Vals AI), MortgageTax (Vals AI), MedQA (Vals AI), MMLU Pro (Artificial Analysis run), MMLU, GeoBench, AI2 Reasoning Challenge

Web design8 of 9 boards

2 more web design boards

Not measured on Design Arena: ASCII art

General26 of 46 boards

20 more general boards

Not measured on Vals Multimodal Index, IFBench, Fiction.LiveBench, Creative writing (Lech Mazur), CL-bench, Surface Evolver Bench, ExploitBench, HellaSwag, WinoGrande, PIQA, CL-bench Life, LMArena Text: German, LMArena Text: Japanese, LMArena Text: Korean, LMArena Text: Polish, LMArena Vision: Chinese, LMArena Vision: humor, LMArena Vision: captioning, LMArena Vision: recognizing things, LMArena Document

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 5.5
BenchmarkResultIndex weight
Aider polyglotCoding Not measured 35%
SWE-bench VerifiedCoding Not measured 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 Not measured Not in index
LiveBench codingCoding 96.3% 20%
LMArena WebDevCoding 1807 15%
Vals IndexGeneral 70.2% Not in index
GPQA DiamondReasoning Not measured Not in index
AIMEMath Not measured Not in index
MMLU ProKnowledge Not measured Not in index
AA Intelligence IndexIntelligence 57.6 Not in index
AA Coding IndexCoding Not measured Not in index
AA Agentic IndexAgentic work Not measured Not in index
Design Arena: websitesWeb design 1336 Not in index
Design Arena: UI componentsWeb design 1386 Not in index
Design Arena: game devWeb design 1458 Not in index
Design Arena: data vizWeb design 1397 Not in index
Design Arena: 3DWeb design 1477 Not in index
Design Arena: all code categoriesWeb design 1390 Not in index
Design Arena: SVGWeb design 1332 Not in index
Design Arena: ASCII artWeb design Not measured Not in index
Design Arena: agents building web appsAgentic work 1318 Not in index
Design Arena: agents building full-stack appsAgentic work Not measured Not in index
Design Arena: agents building mobile appsAgentic work 1323 Not in index
Design Arena: agents building Android appsAgentic work Not measured Not in index
Design Arena: agents building Godot gamesAgentic work Not measured Not in index
Design Arena: agents building gamesAgentic work Not measured 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 92.2% Not in index
LiveBench data analysisGeneral 80.3% Not in index
LiveBench researchAgentic work 85.0% Not in index
LiveBench browserAgentic work 80.0% Not in index
LiveBench long agenticAgentic work 85.0% Not in index
LiveBench designWeb design 86.9% Not in index
LiveCodeBench (Vals AI)Coding Not measured Not in index
SWE-bench Verified (Vals AI)Coding Not measured Not in index
Terminal-Bench 4 (Vals AI)Coding 65.2% Not in index
Vibe Code Bench (Vals AI)Coding 90.3% Not in index
Code migration (Vals AI)Coding 66.7% Not in index
ProgramBench (Vals AI)Coding 18.5% Not in index
SREBench (Vals AI)Agentic work 33.6% Not in index
IOI (Vals AI)Coding 95.1% Not in index
Terminal-Bench 2.1 (Vals AI)Coding 87.6% Not in index
SWE-bench Multimodal (Vals AI)Coding 70.2% Not in index
Vibe Code Bench 1-100 (Vals AI)Coding 30.4% Not in index
SkillsBench (Vals AI)Coding Not measured Not in index
CyberBench (Vals AI)Coding 74.6% Not in index
Finance Agent (Vals AI)Agentic work 58.6% Not in index
Tax Agent Bench (Vals AI)Agentic work 45.6% Not in index
Legal Research Bench (Vals AI)Agentic work 50.5% Not in index
Harvey's Legal Agent Benchmark (Vals AI)Agentic work 9.2% Not in index
Excel Modeling Benchmark (Vals AI)Agentic work 75.9% Not in index
BioMysteryBench (Vals AI)Agentic work 79.3% Not in index
Terminal-Bench-Science (Vals AI)Agentic work 47.1% Not in index
Vals Science IndexAgentic work 58.7% Not in index
Time Horizon Index (Vals AI)Agentic work 91.3% Not in index
CUA-bench (Vals AI)Agentic work 14.0% Not in index
Robo-bench (Vals AI)Agentic work 14.6% Not in index
Public Benefits Bench (Vals AI)General 70.6% Not in index
MysteryMechanism (Vals AI)Reasoning 49.5% Not in index
MMMU Pro (Vals AI)Reasoning Not measured 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 45.8% Not in index
LegalBench (Vals AI)Knowledge Not measured Not in index
CaseLaw (Vals AI)Knowledge Not measured Not in index
CorpFin (Vals AI)Knowledge Not measured Not in index
TaxEval (Vals AI)Knowledge Not measured Not in index
MortgageTax (Vals AI)Knowledge Not measured Not in index
MedQA (Vals AI)Knowledge Not measured Not in index
MedCode (Vals AI)Knowledge 49.8% Not in index
MedScribe (Vals AI)General 91.4% 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 Not measured Not in index
Humanity's Last Exam (Artificial Analysis run)Reasoning 61.4% 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 66.9% Not in index
Terminal-Bench Hard (Artificial Analysis run)Coding Not measured Not in index
IFBenchGeneral Not measured Not in index
Long context reasoning (AA-LCR)General 84.7% Not in index
τ²-Bench TelecomAgentic work Not measured Not in index
AIME 2025 (Artificial Analysis run)Math Not measured Not in index
Terminal-BenchCoding Not measured Not in index
DeepSWECoding Not measured Not in index
FrontierCodeCoding 54.6% Not in index
FrontierSWECoding 62.3% Not in index
GSO-BenchCoding Not measured Not in index
WeirdMLCoding Not measured Not in index
MirrorCodeCoding 77.4% Not in index
APEX-AgentsAgentic work 73.5% Not in index
METR time horizonsAgentic work Not measured Not in index
Remote Labor IndexAgentic work 21.3% 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 Not measured Not in index
PostTrainBenchAgentic work Not measured Not in index
GPQA Diamond (Epoch AI run)Reasoning 90.6% Not in index
ARC-AGIReasoning 98.5% Not in index
ARC-AGI-2Reasoning 93.3% Not in index
Humanity's Last ExamReasoning Not measured Not in index
SimpleBenchReasoning Not measured Not in index
Chess puzzlesReasoning 67.0% Not in index
Mystery game puzzlesReasoning 71.0% Not in index
EBR-benchReasoning 71.4% Not in index
OTIS Mock AIMEMath 100.0% Not in index
FrontierMath, tiers 1 to 3Math 91.2% Not in index
FrontierMath, tier 4Math 95.0% Not in index
ProofBenchMath 100.0% Not in index
MATH level 5Math Not measured Not in index
GSM8KMath Not measured Not in index
SimpleQA VerifiedKnowledge 72.2% Not in index
MMLUKnowledge Not measured Not in index
GeoBenchKnowledge Not measured Not in index
DTBenchGeneral 98.9% Not in index
LMCAGeneral 68.2% Not in index
Fiction.LiveBenchGeneral Not measured Not in index
Creative writing (Lech Mazur)General Not measured Not in index
CL-benchGeneral Not measured Not in index
Surface Evolver BenchGeneral Not measured Not in index
Furniture assemblyGeneral 83.3% Not in index
ExploitBenchGeneral Not measured Not in index
CybenchCoding Not measured Not in index
TheAgentCompanyAgentic work Not measured Not in index
OSWorldAgentic work Not measured Not in index
SpireClimbAgentic work 3.3% 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 Not measured Not in index
ALE-BenchCoding 2147.4 Not in index
Vending-Bench 2Agentic work $9,235 Not in index
Epoch Capabilities IndexIntelligence 166.8 Not in index
LMArena TextGeneral 1516 Not in index
LMArena Text: codingCoding 1545 Not in index
LMArena Text: hard promptsReasoning 1535 Not in index
LMArena Text: mathMath 1508 Not in index
LMArena Text: instruction followingGeneral 1536 Not in index
LMArena Text: creative writingGeneral 1534 Not in index
LMArena VisionGeneral 1321 Not in index
LMArena Text: EnglishGeneral 1517 Not in index
LMArena Text: non-EnglishGeneral 1507 Not in index
LMArena Text: ChineseGeneral 1584 Not in index
LMArena Text: GermanGeneral Not measured Not in index
LMArena Text: JapaneseGeneral Not measured Not in index
LMArena Text: KoreanGeneral Not measured Not in index
LMArena Text: FrenchGeneral 1505 Not in index
LMArena Text: SpanishGeneral 1519 Not in index
LMArena Text: RussianGeneral 1519 Not in index
LMArena Text: PolishGeneral Not measured Not in index
LMArena Text: multi-turnGeneral 1502 Not in index
LMArena Text: longer queriesGeneral 1531 Not in index
LMArena Text: expertReasoning 1550 Not in index
LMArena Text: hard prompts in EnglishReasoning 1533 Not in index
LMArena Text: software and ITCoding 1538 Not in index
LMArena Text: mathematical workMath 1506 Not in index
LMArena Text: scienceKnowledge 1522 Not in index
LMArena Text: medicine and healthcareKnowledge 1513 Not in index
LMArena Text: legal and governmentKnowledge 1510 Not in index
LMArena Text: business and financeKnowledge 1492 Not in index
LMArena Text: writing and languageGeneral 1534 Not in index
LMArena Text: entertainment and mediaGeneral 1511 Not in index
LMArena WebDev: ReactCoding 1855 Not in index
LMArena WebDev: HTMLCoding 1753 Not in index
LMArena WebDev: from an imageCoding 1753 Not in index
LMArena Vision: EnglishGeneral 1317 Not in index
LMArena Vision: ChineseGeneral Not measured Not in index
LMArena Vision: reading textGeneral 1326 Not in index
LMArena Vision: diagramsReasoning 1345 Not in index
LMArena Vision: homeworkReasoning 1362 Not in index
LMArena Vision: humorGeneral Not measured Not in index
LMArena Vision: captioningGeneral Not measured Not in index
LMArena Vision: recognizing thingsGeneral Not measured Not in index
LMArena Vision: creative writingGeneral 1320 Not in index
LMArena SearchAgentic work 1213 Not in index
LMArena DocumentGeneral Not measured 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 5.5 pricing
$0.0112Dashed line: median $1.80, log scale$600.00
$20.00 per million output tokens is cheaper than 7% of the 344 paid models in the catalog.

Cost per solved task

How it is computed

Neither board that publishes what a SWE-bench Verified attempt costs, Vals AI and swebench.com, has run this model. We leave the number out rather than estimate it.

LiveBench, on its own coding tasks, publishes what one task cost this model: $5.031, at a score of 96.3%. LiveBench counts that as $5.224 per successful task. Different tasks from SWE-bench, so it is not our number and does not enter its ranking. LiveBench coding

Nearly as good as Claude Opus 5.5, 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 5.5's results
BoardResultWhat the run costAlso published
LiveBench coding 96.3% $5.0308 per task Output tokens per task 84,646
Vals Index 70.2% $28.12 per test Duration, as printed 1h 25m
LiveBench reasoning 92.2% $0.2522 per task Output tokens per task 12,280
LiveBench data analysis 80.3% $0.8146 per task Output tokens per task 39,924
LiveBench research 85.0% $8.8178 per task Output tokens per task 129,426
LiveBench browser 80.0% $14.6698 per task Output tokens per task 34,270
LiveBench long agentic 85.0% $38.0088 per task Output tokens per task 463,030
LiveBench design 86.9% $5.7483 per task Output tokens per task 150,005
Terminal-Bench 4 (Vals AI) 65.2% $13.20 per test Duration, as printed 1h 04m
Vibe Code Bench (Vals AI) 90.3% $57.92 per test Duration, as printed 1h 36m
Code migration (Vals AI) 66.7% $112.97 per test Duration, as printed 3h 19m
ProgramBench (Vals AI) 18.5% $68.05 per test Duration, as printed 2h 24m
67 more boards
What each board publishes about the runs behind Anthropic: Claude Opus 5.5's results, continued
SREBench (Vals AI) 33.6% $34.65 per test Duration, as printed 1h 37m
IOI (Vals AI) 95.1% $5.26 per test Duration, as printed 17m 15s
Terminal-Bench 2.1 (Vals AI) 87.6% $0.50 per test Duration, as printed 6m 23s
SWE-bench Multimodal (Vals AI) 70.2% $4.92 per test Duration, as printed 18m 32s
Vibe Code Bench 1-100 (Vals AI) 30.4% $44.12 per test Duration, as printed 2h 28m
CyberBench (Vals AI) 74.6% $4.17 per test Duration, as printed 23m 02s
Finance Agent (Vals AI) 58.6% $9.22 per test Duration, as printed 33m 08s
Tax Agent Bench (Vals AI) 45.6% $15.09 per test Duration, as printed 1h 07m
Legal Research Bench (Vals AI) 50.5% $25.16 per test Duration, as printed 1h 52m
Harvey's Legal Agent Benchmark (Vals AI) 9.2% $21.38 per test Duration, as printed 58m 27s
Excel Modeling Benchmark (Vals AI) 75.9% $11.02 per test Duration, as printed 35m 06s
BioMysteryBench (Vals AI) 79.3% $3.64 per test Duration, as printed 12m 19s
Terminal-Bench-Science (Vals AI) 47.1% $19.12 per test Duration, as printed 2h 28m
Vals Science Index 58.7% $9.13 per test Duration, as printed 1h 00m
Public Benefits Bench (Vals AI) 70.6% $5.95 per test Nothing else
MysteryMechanism (Vals AI) 49.5% $4.62 per test Duration, as printed 19m 38s
FrontierSWE 62.3% $98.87 average cost per task Best of 5 runs 71.5% · Hours per task 14.3 h
ProofBench 100.0% $0.9616 per test Time per proof 5m 51s
ALE-Bench 2147.4 $0.2712 per problem Tokens per problem 16,891
LMArena WebDev 1807 Elo Not published Votes 2,925 · Interval (±) ±13.8
Design Arena: websites 1336 Elo Not published Battles 2,127
Design Arena: UI components 1386 Elo Not published Battles 371
Design Arena: game dev 1458 Elo Not published Battles 765
Design Arena: data viz 1397 Elo Not published Battles 638
Design Arena: 3D 1477 Elo Not published Battles 857
Design Arena: all code categories 1390 Elo Not published Battles 4,531
Design Arena: SVG 1332 Elo Not published Battles 998
Design Arena: agents building web apps 1318 Elo Not published Battles 507
Design Arena: agents building mobile apps 1323 Elo Not published Battles 610
SAGE (Vals AI) 45.8% Not published Latency, as printed 1m 54s
MedCode (Vals AI) 49.8% Not published Latency, as printed 4m 07s
MedScribe (Vals AI) 91.4% Not published Latency, as printed 7m 22s
APEX-Agents 73.5% Not published Mean score 81.3%
LMArena Text 1516 Elo Not published Votes 8,300 · Interval (±) ±7.3
LMArena Text: coding 1545 Elo Not published Votes 1,894 · Interval (±) ±13.8
LMArena Text: hard prompts 1535 Elo Not published Votes 5,157 · Interval (±) ±9.0
LMArena Text: math 1508 Elo Not published Votes 416 · Interval (±) ±28.3
LMArena Text: instruction following 1536 Elo Not published Votes 2,851 · Interval (±) ±11.8
LMArena Text: creative writing 1534 Elo Not published Votes 1,945 · Interval (±) ±15.0
LMArena Vision 1321 Elo Not published Votes 3,035 · Interval (±) ±11.7
LMArena Text: English 1517 Elo Not published Votes 3,165 · Interval (±) ±11.1
LMArena Text: non-English 1507 Elo Not published Votes 5,130 · Interval (±) ±9.0
LMArena Text: Chinese 1584 Elo Not published Votes 767 · Interval (±) ±22.0
LMArena Text: French 1505 Elo Not published Votes 284 · Interval (±) ±35.2
LMArena Text: Spanish 1519 Elo Not published Votes 294 · Interval (±) ±33.5
LMArena Text: Russian 1519 Elo Not published Votes 1,089 · Interval (±) ±18.2
LMArena Text: multi-turn 1502 Elo Not published Votes 1,088 · Interval (±) ±18.4
LMArena Text: longer queries 1531 Elo Not published Votes 3,519 · Interval (±) ±11.0
LMArena Text: expert 1550 Elo Not published Votes 907 · Interval (±) ±19.9
LMArena Text: hard prompts in English 1533 Elo Not published Votes 1,990 · Interval (±) ±13.8
LMArena Text: software and IT 1538 Elo Not published Votes 2,904 · Interval (±) ±11.3
LMArena Text: mathematical work 1506 Elo Not published Votes 467 · Interval (±) ±26.2
LMArena Text: science 1522 Elo Not published Votes 1,439 · Interval (±) ±16.1
LMArena Text: medicine and healthcare 1513 Elo Not published Votes 564 · Interval (±) ±26.0
LMArena Text: legal and government 1510 Elo Not published Votes 712 · Interval (±) ±23.0
LMArena Text: business and finance 1492 Elo Not published Votes 1,479 · Interval (±) ±15.8
LMArena Text: writing and language 1534 Elo Not published Votes 2,477 · Interval (±) ±13.1
LMArena Text: entertainment and media 1511 Elo Not published Votes 2,212 · Interval (±) ±13.8
LMArena WebDev: React 1855 Elo Not published Votes 2,007 · Interval (±) ±17.3
LMArena WebDev: HTML 1753 Elo Not published Votes 135 · Interval (±) ±60.8
LMArena WebDev: from an image 1753 Elo Not published Votes 781 · Interval (±) ±24.0
LMArena Vision: English 1317 Elo Not published Votes 992 · Interval (±) ±19.9
LMArena Vision: reading text 1326 Elo Not published Votes 2,118 · Interval (±) ±13.5
LMArena Vision: diagrams 1345 Elo Not published Votes 711 · Interval (±) ±22.9
LMArena Vision: homework 1362 Elo Not published Votes 422 · Interval (±) ±29.4
LMArena Vision: creative writing 1320 Elo Not published Votes 283 · Interval (±) ±37.4
LMArena Search 1213 Elo Not published Votes 10,842 · Interval (±) ±7.1

On these lists

Compare with models of a similar score

All 135 comparisons for Claude Opus 5.5