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Anthropic Claude Opus 4.5

  • Anthropic
  • Released November 24, 2025
  • No public weights listed
  • 200K context

As of October 20, 2026, Anthropic Claude Opus 4.5 ranks #54 of 213 models overall with 29.1 on the Artificial Analysis Intelligence Index. Its strongest category is knowledge, where it ranks #29 of 147. Anthropic Claude Opus 4.5 costs $5.00 per million input tokens and $25.00 per million output tokens. It was released on November 24, 2025.

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

  • Coding index 66.8 Partial, 2 benchmarks
  • Cost per solved task $1.37 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 200K Tokens per request

About and specs

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...

API model id anthropic/claude-opus-4.5
  • Tool callingListed
  • Structured outputsListed
  • JSON modeListed
  • Reasoning modeListed
  • Web searchNot listed
Takes in
Files, Images, Text
Gives back
Text
Context window
200K tokens
Max output
64K 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Withdrawn on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
46 tokens/s via Anthropic, 30-minute median
First token on OpenRouter
1.1 s via Anthropic, 30-minute median

Benchmarks: 106 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
#54of 213 overall 29.1AA Intelligence Index

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

Coding index

66.8
  • Aider polyglot Not measured
  • SWE-bench Verified 79.2% 79 of 100
  • LiveBench coding Not measured
  • LMArena WebDev Elo, scaled from 1200 to 1900 1494 Elo 42 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

Coding15 of 34 boards

9 more coding boards

Not measured on SWE-bench Lite, 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), SciCode, DeepSWE, FrontierCode, FrontierSWE, MirrorCode, ALE-Bench, LMArena WebDev: from an image

Intelligence2 of 2 boards

Agentic work12 of 39 boards

6 more agentic work boards

Not measured on AA Agentic Index, Design Arena: agents building Godot games, Design Arena: agents building 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), APEX-Agents, OSWorld 2.0, PostTrainBench, TheAgentCompany, SpireClimb, LMArena Search

Reasoning16 of 21 boards

10 more reasoning boards

Not measured on LiveBench reasoning, MysteryMechanism (Vals AI), BIG-Bench Hard, LMArena Vision: diagrams, LMArena Vision: homework

Math10 of 13 boards

4 more math boards

Not measured on MATH 500 (Vals AI), MATH level 5, GSM8K

Knowledge15 of 17 boards

9 more knowledge boards

Not measured on MMLU, AI2 Reasoning Challenge

Web design8 of 9 boards

2 more web design boards

Not measured on LiveBench design

General26 of 46 boards

20 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, CL-bench Life, LMArena Vision, LMArena Vision: English, LMArena Vision: Chinese, LMArena Vision: reading text, LMArena Vision: humor, LMArena Vision: captioning, LMArena Vision: recognizing things, LMArena Vision: creative writing

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 4.5
BenchmarkResultIndex weight
Aider polyglotCoding Not measured 35%
SWE-bench VerifiedCoding 79.2% 30%
SWE-bench LiteCoding Not measured Not in index
SWE-bench (full test set)Coding 52.6% Not in index
SWE-bench MultimodalCoding Not measured Not in index
SWE-bench MultilingualCoding 70.7% Not in index
LiveBench codingCoding Not measured 20%
LMArena WebDevCoding 1494 15%
Vals IndexGeneral Not measured Not in index
GPQA DiamondReasoning 85.9% Not in index
AIMEMath 95.4% Not in index
MMLU ProKnowledge 87.3% Not in index
AA Intelligence IndexIntelligence 29.1 Not in index
AA Coding IndexCoding Not measured Not in index
AA Agentic IndexAgentic work Not measured Not in index
Design Arena: websitesWeb design 1247 Not in index
Design Arena: UI componentsWeb design 1239 Not in index
Design Arena: game devWeb design 1229 Not in index
Design Arena: data vizWeb design 1243 Not in index
Design Arena: 3DWeb design 1214 Not in index
Design Arena: all code categoriesWeb design 1242 Not in index
Design Arena: SVGWeb design 1180 Not in index
Design Arena: ASCII artWeb design 1190 Not in index
Design Arena: agents building web appsAgentic work 1159 Not in index
Design Arena: agents building full-stack appsAgentic work 1156 Not in index
Design Arena: agents building mobile appsAgentic work 1188 Not in index
Design Arena: agents building Android appsAgentic work 1192 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 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 83.7% Not in index
SWE-bench Verified (Vals AI)Coding 76.4% Not in index
Terminal-Bench 4 (Vals AI)Coding Not measured Not in index
Vibe Code Bench (Vals AI)Coding 20.6% 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 83.0% Not in index
MATH 500 (Vals AI)Math Not measured Not in index
MGSM (Vals AI)Math 95.2% Not in index
SAGE (Vals AI)General 52.1% Not in index
LegalBench (Vals AI)Knowledge 84.6% Not in index
CaseLaw (Vals AI)Knowledge 62.6% Not in index
CorpFin (Vals AI)Knowledge 65.1% Not in index
TaxEval (Vals AI)Knowledge 74.9% Not in index
MortgageTax (Vals AI)Knowledge 68.7% Not in index
MedQA (Vals AI)Knowledge 95.9% Not in index
MedCode (Vals AI)Knowledge 49.2% Not in index
MedScribe (Vals AI)General 85.3% Not in index
Vals Multimodal IndexGeneral Not measured Not in index
AA Math IndexMath 91.3 Not in index
GPQA Diamond (Artificial Analysis run)Reasoning 86.6% Not in index
Humanity's Last Exam (Artificial Analysis run)Reasoning 30.1% Not in index
MMLU Pro (Artificial Analysis run)Knowledge 89.5% Not in index
LiveCodeBench (Artificial Analysis run)Coding 87.1% Not in index
SciCodeCoding Not measured Not in index
Terminal-Bench Hard (Artificial Analysis run)Coding 47.0% Not in index
IFBenchGeneral 58.0% Not in index
Long context reasoning (AA-LCR)General 77.3% Not in index
τ²-Bench TelecomAgentic work 89.5% Not in index
AIME 2025 (Artificial Analysis run)Math 91.3% Not in index
Terminal-BenchCoding 63.1% Not in index
DeepSWECoding Not measured Not in index
FrontierCodeCoding Not measured Not in index
FrontierSWECoding Not measured Not in index
GSO-BenchCoding 26.5% Not in index
WeirdMLCoding 63.7% Not in index
MirrorCodeCoding Not measured Not in index
APEX-AgentsAgentic work Not measured Not in index
METR time horizonsAgentic work 75.0% Not in index
Remote Labor IndexAgentic work 3.8% Not in index
GDPvalAgentic work 45.5% Not in index
OSWorld 2.0Agentic work Not measured Not in index
BALROGAgentic work 43.5% Not in index
DeepResearch BenchAgentic work 54.8% Not in index
PostTrainBenchAgentic work Not measured Not in index
GPQA Diamond (Epoch AI run)Reasoning 86.0% Not in index
ARC-AGIReasoning 80.0% Not in index
ARC-AGI-2Reasoning 37.6% Not in index
Humanity's Last ExamReasoning 25.2% Not in index
SimpleBenchReasoning 62.0% Not in index
Chess puzzlesReasoning 14.0% Not in index
Mystery game puzzlesReasoning 22.0% Not in index
EBR-benchReasoning 14.3% Not in index
OTIS Mock AIMEMath 86.1% Not in index
FrontierMath, tiers 1 to 3Math 34.4% Not in index
FrontierMath, tier 4Math 4.9% Not in index
ProofBenchMath 36.0% Not in index
MATH level 5Math Not measured Not in index
GSM8KMath Not measured Not in index
SimpleQA VerifiedKnowledge 45.7% Not in index
MMLUKnowledge Not measured Not in index
GeoBenchKnowledge 75.0% Not in index
DTBenchGeneral 89.9% Not in index
LMCAGeneral 44.5% Not in index
Fiction.LiveBenchGeneral Not measured Not in index
Creative writing (Lech Mazur)General Not measured Not in index
CL-benchGeneral 21.1% 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 82.0% Not in index
TheAgentCompanyAgentic work Not measured Not in index
OSWorldAgentic work 66.3% Not in index
SpireClimbAgentic work Not measured Not in index
VPCTReasoning 40.0% 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 Not measured Not in index
Vending-Bench 2Agentic work $4,967 Not in index
Epoch Capabilities IndexIntelligence 150.2 Not in index
LMArena TextGeneral 1451 Not in index
LMArena Text: codingCoding 1499 Not in index
LMArena Text: hard promptsReasoning 1476 Not in index
LMArena Text: mathMath 1458 Not in index
LMArena Text: instruction followingGeneral 1472 Not in index
LMArena Text: creative writingGeneral 1443 Not in index
LMArena VisionGeneral Not measured Not in index
LMArena Text: EnglishGeneral 1461 Not in index
LMArena Text: non-EnglishGeneral 1438 Not in index
LMArena Text: ChineseGeneral 1470 Not in index
LMArena Text: GermanGeneral 1449 Not in index
LMArena Text: JapaneseGeneral 1412 Not in index
LMArena Text: KoreanGeneral 1424 Not in index
LMArena Text: FrenchGeneral 1471 Not in index
LMArena Text: SpanishGeneral 1453 Not in index
LMArena Text: RussianGeneral 1447 Not in index
LMArena Text: PolishGeneral 1439 Not in index
LMArena Text: multi-turnGeneral 1466 Not in index
LMArena Text: longer queriesGeneral 1479 Not in index
LMArena Text: expertReasoning 1487 Not in index
LMArena Text: hard prompts in EnglishReasoning 1482 Not in index
LMArena Text: software and ITCoding 1483 Not in index
LMArena Text: mathematical workMath 1469 Not in index
LMArena Text: scienceKnowledge 1454 Not in index
LMArena Text: medicine and healthcareKnowledge 1444 Not in index
LMArena Text: legal and governmentKnowledge 1459 Not in index
LMArena Text: business and financeKnowledge 1448 Not in index
LMArena Text: writing and languageGeneral 1451 Not in index
LMArena Text: entertainment and mediaGeneral 1434 Not in index
LMArena WebDev: ReactCoding 1478 Not in index
LMArena WebDev: HTMLCoding 1510 Not in index
LMArena WebDev: from an imageCoding Not measured Not in index
LMArena Vision: EnglishGeneral Not measured Not in index
LMArena Vision: ChineseGeneral Not measured Not in index
LMArena Vision: reading textGeneral Not measured Not in index
LMArena Vision: diagramsReasoning Not measured Not in index
LMArena Vision: homeworkReasoning Not measured 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 Not measured Not in index
LMArena SearchAgentic work Not measured Not in index
LMArena DocumentGeneral 1462 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 4.5 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
$1.05one attempt, Vals AI 76.4%tasks solved $1.37per solved task

Nearly as good as Claude Opus 4.5, 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 4.5's results
BoardResultWhat the run costAlso published
SWE-bench Multilingual 70.7% $0.8336 per attempt Nothing else
SWE-bench Verified (Vals AI) 76.4% $1.05 per test Duration, as printed 5m 21s
Vibe Code Bench (Vals AI) 20.6% $32.87 per test Duration, as printed 38m 03s
WeirdML 63.7% $0.7383 per run Median lines of code 173
ARC-AGI 80.0% $1.47 per task Nothing else
ARC-AGI-2 37.6% $2.40 per task Nothing else
ProofBench 36.0% $1.267 per test Time per proof 1h 03m
LMArena WebDev 1494 Elo Not published Votes 11,029 · Interval (±) ±8.3
GPQA Diamond 85.9% Not published Latency, as printed 2m 19s
AIME 95.4% Not published Latency, as printed 3m 32s
MMLU Pro 87.3% Not published Latency, as printed 39 s
Design Arena: websites 1247 Elo Not published Battles 21,788
54 more boards
What each board publishes about the runs behind Anthropic: Claude Opus 4.5's results, continued
Design Arena: UI components 1239 Elo Not published Battles 2,085
Design Arena: game dev 1229 Elo Not published Battles 5,034
Design Arena: data viz 1243 Elo Not published Battles 1,495
Design Arena: 3D 1214 Elo Not published Battles 6,015
Design Arena: all code categories 1242 Elo Not published Battles 35,207
Design Arena: SVG 1180 Elo Not published Battles 4,787
Design Arena: ASCII art 1190 Elo Not published Battles 429
Design Arena: agents building web apps 1159 Elo Not published Battles 2,697
Design Arena: agents building full-stack apps 1156 Elo Not published Battles 1,396
Design Arena: agents building mobile apps 1188 Elo Not published Battles 1,542
Design Arena: agents building Android apps 1192 Elo Not published Battles 661
LiveCodeBench (Vals AI) 83.7% Not published Latency, as printed 2m 44s
MMMU Pro (Vals AI) 83.0% Not published Latency, as printed 1m 15s
MGSM (Vals AI) 95.2% Not published Latency, as printed 12 s
SAGE (Vals AI) 52.1% Not published Latency, as printed 1m 27s
LegalBench (Vals AI) 84.6% Not published Latency, as printed 7.6 s
CaseLaw (Vals AI) 62.6% Not published Latency, as printed 17 s
CorpFin (Vals AI) 65.1% Not published Latency, as printed 18 s
TaxEval (Vals AI) 74.9% Not published Latency, as printed 47 s
MortgageTax (Vals AI) 68.7% Not published Latency, as printed 11 s
MedQA (Vals AI) 95.9% Not published Latency, as printed 32 s
MedCode (Vals AI) 49.2% Not published Latency, as printed 1m 01s
MedScribe (Vals AI) 85.3% Not published Latency, as printed 1m 12s
LMArena Text 1451 Elo Not published Votes 72,899 · Interval (±) ±3.1
LMArena Text: coding 1499 Elo Not published Votes 17,986 · Interval (±) ±5.3
LMArena Text: hard prompts 1476 Elo Not published Votes 43,250 · Interval (±) ±3.9
LMArena Text: math 1458 Elo Not published Votes 4,547 · Interval (±) ±9.0
LMArena Text: instruction following 1472 Elo Not published Votes 21,834 · Interval (±) ±5.0
LMArena Text: creative writing 1443 Elo Not published Votes 11,412 · Interval (±) ±6.3
LMArena Text: English 1461 Elo Not published Votes 31,213 · Interval (±) ±4.3
LMArena Text: non-English 1438 Elo Not published Votes 41,682 · Interval (±) ±3.9
LMArena Text: Chinese 1470 Elo Not published Votes 5,403 · Interval (±) ±8.5
LMArena Text: German 1449 Elo Not published Votes 1,134 · Interval (±) ±18.2
LMArena Text: Japanese 1412 Elo Not published Votes 640 · Interval (±) ±24.4
LMArena Text: Korean 1424 Elo Not published Votes 1,170 · Interval (±) ±18.2
LMArena Text: French 1471 Elo Not published Votes 2,026 · Interval (±) ±14.5
LMArena Text: Spanish 1453 Elo Not published Votes 2,162 · Interval (±) ±13.5
LMArena Text: Russian 1447 Elo Not published Votes 9,053 · Interval (±) ±6.7
LMArena Text: Polish 1439 Elo Not published Votes 1,891 · Interval (±) ±13.6
LMArena Text: multi-turn 1466 Elo Not published Votes 12,968 · Interval (±) ±6.0
LMArena Text: longer queries 1479 Elo Not published Votes 24,254 · Interval (±) ±4.9
LMArena Text: expert 1487 Elo Not published Votes 5,688 · Interval (±) ±8.3
LMArena Text: hard prompts in English 1482 Elo Not published Votes 18,759 · Interval (±) ±5.2
LMArena Text: software and IT 1483 Elo Not published Votes 26,901 · Interval (±) ±4.6
LMArena Text: mathematical work 1469 Elo Not published Votes 3,778 · Interval (±) ±9.9
LMArena Text: science 1454 Elo Not published Votes 11,580 · Interval (±) ±6.1
LMArena Text: medicine and healthcare 1444 Elo Not published Votes 4,920 · Interval (±) ±8.9
LMArena Text: legal and government 1459 Elo Not published Votes 5,431 · Interval (±) ±8.5
LMArena Text: business and finance 1448 Elo Not published Votes 14,098 · Interval (±) ±5.7
LMArena Text: writing and language 1451 Elo Not published Votes 16,912 · Interval (±) ±5.4
LMArena Text: entertainment and media 1434 Elo Not published Votes 14,080 · Interval (±) ±5.8
LMArena WebDev: React 1478 Elo Not published Votes 4,740 · Interval (±) ±10.6
LMArena WebDev: HTML 1510 Elo Not published Votes 6,278 · Interval (±) ±12.6
LMArena Document 1462 Elo Not published Votes 7,981 · Interval (±) ±10.4

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All 135 comparisons for Claude Opus 4.5