TL;DR

Claude Opus 5.5 by Anthropic scores 86.68 overall, costs $4.00 per 1M input tokens and $20.00 per 1M output tokens, and carries a context window of 1M tokens — observed 2026-10-23.

Claude Opus 5.5

Anthropic · Proprietary · rank 1 · bench-align-v5

Compare this model Model a workload

Canonical idclaude-opus-5-5

Overall score86.68

Context window1M tokens

Release date2026-09-22

Access typeProprietary

Blended $/1M$8.0075% input / 25% output

Capability shape

Seven axes from the ranking source. A missing axis is drawn as a gap.

Capability evidence

Agentic65.3

Coding87.5

Knowledge85.4

Reasoning86.1

Multimodal & Grounded92.2

Instruction FollowingUnavailable

Runtime service evidence

Measured values with the date they were observed. Nothing is inferred from a sibling model or a provider claim.

Time to first token: latency to the first answer chunk (Artificial Analysis, via BenchLM). Reasoning models include thinking time, so values can run to tens or hundreds of seconds.

Evidence key: Observed

Runtime measurements
Measurement	Value	Observed	Last good	Evidence
Time to first token	573.15 s	2026-10-23	2026-10-23
Throughput	95 tok/s	2026-10-23	2026-10-23

Regional or per-endpoint measurements appear only when the API supplies them; none are modelled here.

Endpoint and price matrix

Every published price component, including cache reads and writes.

Price components
Component	USD	Evidence
Input / 1M tokens	$4.00
Output / 1M tokens	$20.00
Cache read / 1M tokens	$0.20
Cache write / 1M tokens	$5.00
Blended / 1M (75% input / 25% output)	$8.00
Cost per successful task (LiveBench)	Unavailable

Self-hosted listingAnthropic's September 22, 2026 Claude Opus 5.5 model documentation lists the `claude-opus-5-5` API model at $4 input / $20 output per million tokens, with $0.20 cache reads. Five-minute and one-hour cache writes are $5 and $8 per million tokens; Batch API input and output receive a 50% discount.The rates above are a hosted price matched from another provider, not a first-party list price.

Workload-aware monthly cost example

10 conversations per day × 8 messages × 22 active days, 1200 input and 400 output tokens per message, no cache. This uses the same calculator as the cost simulator, so an unavailable applicable rate makes the example unavailable too.

Modelled monthly cost$22.53

Modelled tokens2.82M

Open the simulatorChange this workload

Benchmark record

83 matched benchmark rows with their published value, unit, and provenance.

Knowledge

Knowledge benchmarks
Benchmark	Value	Tasks	Difficulty	Provenance
HealthBench (raw) HealthBench raw score	68.1	5,000 multi-turn patient conversations	Realistic healthcare conversations	HealthBench: Evaluating Large Language Models Towards Improved Human Health
HealthBench (length-adjusted) HealthBench length-adjusted score	60.6	5,000 multi-turn patient conversations	Realistic healthcare conversations	HealthBench: Evaluating Large Language Models Towards Improved Human Health
HealthBench Professional (raw) HealthBench Professional raw score	77.1	525 physician-authored conversations	Professional clinical tasks	HealthBench Professional: Evaluating Large Language Models on Real Clinician Chats

Lifecycle and limitations log

Lifecycle events the source associates with this model, plus what this profile does not claim.

Claude Opus 5.5Release · confirmed · announced Unavailable · effective 2026-09-22Anthropic

What this profile does not claimValues are reproduced exactly as their sources published them, in the units those sources declared; none are converted, interpolated, or averaged across providers. Any field marked unavailable was attempted and not returned — the attempt timestamp is in each badge. Last attempted fetch for this model’s score: 2026-10-23 13:17 UTC.

Benchmark

Value

Tasks

Difficulty

Provenance

LAB all-pass (Harvey held-out)

Legal Agent Benchmark all-pass rate — Harvey held-out set

8.3

Harvey-held-out legal-agent tasks

Professional legal work

Claude Opus 5 System Card

LAB criterion-pass (Harvey held-out)

Legal Agent Benchmark mean criterion-pass rate — Harvey held-out set

91.2

Harvey-held-out legal-agent tasks

Professional legal work

Claude Opus 5 System Card

Toolathlon Verified Pass@3

Toolathlon Verified Pass@3

82.4

108 verified real-world tool-use tasks

Long-horizon application tool use

Claude Opus 5 System Card

Toolathlon Verified Pass³

Toolathlon Verified Pass cubed

72.2

108 verified real-world tool-use tasks

Long-horizon application tool use

Claude Opus 5 System Card

Toolathlon Verified avg. turns

Toolathlon Verified average assistant turns

26.9

108 verified real-world tool-use tasks

Long-horizon application tool use

Claude Opus 5 System Card

Terminal-Bench 4.0

Terminal-Bench 4.0

66.40

66 professional computer-work tasks

Frontier autonomous knowledge work

Terminal-Bench 4.0

Terminal-Bench-Science 0.1

Terminal-Bench-Science 0.1

58.7

70 expert-curated scientific research workflows

Frontier scientific research workflows

Terminal-Bench-Science 0.1

AA Briefcase

Artificial Analysis Briefcase

1803

Professional knowledge-work tasks

Professional work

Artificial Analysis Briefcase Benchmark Leaderboard

AA AutomationBench

Artificial Analysis AutomationBench

69.5

Business-process automation tasks

Agentic automation

Artificial Analysis AutomationBench Benchmark Leaderboard

AA Harvey LAB v1.0

Artificial Analysis Harvey LAB-AA v1.0

91.2

Legal agent tasks

Professional legal work

Artificial Analysis Harvey LAB-AA Benchmark Leaderboard

AA ITBench

Artificial Analysis ITBench-AA

38.2

IT incident-response tasks

Enterprise IT operations

Artificial Analysis ITBench-AA Benchmark Leaderboard

HLE w/ tools

Humanity's Last Exam with tools

67.7

Expert questions with tool use

Frontier tool-augmented reasoning

DeepSeek-V4 Technical Report

GDPval-AA

GDPval-AA

1846

Agentic real-world work tasks

Professional agentic workflows

DeepSeek-V4 Technical Report

GDPval-AA

GDPval-AA normalized

68.3

Economically valuable tasks

Professional agentic workflows

Artificial Analysis model benchmarks

AA Terminal-Bench 4.0

Artificial Analysis Terminal-Bench v4.0

59.6

Terminal-based agent tasks

Agentic software engineering

Artificial Analysis Terminal-Bench v4.0 Benchmark Leaderboard

GDP.pdf

Artificial Analysis GDP.pdf

26.2

Professional document-production tasks

Professional knowledge work

GDP.pdf Benchmark Leaderboard

AA-AnalystAgent

Artificial Analysis AnalystAgent

56.3

Spreadsheet and document analysis questions

Business and data analysis

AA-AnalystAgent Benchmark Leaderboard

OSWorld 2.0

OSWorld 2.0

48.7

108 long-horizon computer-use workflows

Long-horizon professional workflows

OSWorld2.0: Benchmarking Computer Use Agents on Long-Horizon Real-World Tasks

Toolathlon-Verified

Toolathlon-Verified

77.8

Verified multi-tool workflows

Advanced tool use

Kimi K3: Open Frontier Intelligence

AutomationBench

AutomationBench

40.0

600 public automation tasks

Long-horizon automation

Kimi K3: Open Frontier Intelligence

CWE-bench v1

CWE-bench v1

67.0

Audit and patch held-out C/C++, Go, Java, TypeScript/JavaScript, Python, and Rust repositories

Frontier agent evaluation

CWE-bench v1 leaderboard and methodology

Hermes Index

Hermes Index: agentic capability and cost per task inside Hermes Agent

63.3

Four suites: Hermes Bench (150 tasks), TerminalBench 4 without its 4 GPU tasks, TerminalBench Science and SkillsBench

Frontier agentic

Hermes Index: an agentic model leaderboard

Hermes Bench

Hermes Bench: 150 agent tasks graded on the files and state the agent leaves behind

76.7

150 tasks across 25 categories

Frontier agentic

Hermes Bench (Hermes Index)

MazeBench

MazeBench: visual spatial reasoning in a 3D open world

100 hidden gems across 256 rooms in one open world

Long-horizon spatial planning, with single puzzles that can take over one hundred moves

MazeBench Results

Benchmark

Value

Tasks

Difficulty

Provenance

Chartography (no tools)

Chartography without tools

64.4

100 specialized chart types

Professional chart reasoning

Chartography

Chartography (tools)

Chartography with image and code tools

89.0

100 specialized chart types

Professional chart reasoning

Chartography

BenchCAD Vision2Code (no tools)

BenchCAD Vision2Code voxel IoU without tools

0.730

1,000-file Vision2Code subset

Programmatic CAD generation

BenchCAD: A comprehensive, industry-standard benchmark for programmatic CAD

BenchCAD Vision2Code (tools)

BenchCAD Vision2Code voxel IoU with tools

0.962

1,000-file Vision2Code subset

Programmatic CAD generation

BenchCAD: A comprehensive, industry-standard benchmark for programmatic CAD

OfficeQA

OfficeQA

78.9

Historical Treasury Bulletin questions

Professional document reasoning

Claude Opus 5 System Card

AA-MMMU-Pro

Artificial Analysis MMMU-Pro

87.7

Multimodal academic reasoning

Frontier multimodal

Artificial Analysis MMMU-Pro Benchmark Leaderboard

Design Arena Website

Design Arena Website Elo

1335

Website generation comparisons

Design and website generation

OpenRouter Grok 4.3 benchmarks

OfficeQA Pro

OfficeQA Pro

67.7

Document and spreadsheet tasks

Enterprise grounded reasoning

OfficeQA Pro: An Enterprise Benchmark for End-to-End Grounded Reasoning

Biomedical image analysis

Anthropic biomedical-image-analysis evaluation

71.4

91 cases across 31 biomedical imaging tasks

Biomedical image analysis

Claude Opus 5.5 System Card

ParseBench

ParseBench: document parsing for AI agents (LlamaIndex leaderboard)

79.85

2,078 human-verified enterprise pages from insurance, finance and government documents

No method is strong on all five dimensions; charts and visual grounding separate the field

ParseBench: A Document Parsing Benchmark for AI Agents

ExtractBench (LlamaIndex)

ExtractBench: schema-guided enterprise document extraction (LlamaIndex leaderboard)

86.06

370 documents, 4,869 pages, 8 business domains, 67 document types, each with a JSON Schema

Short documents are near solved; long record lists and grounding separate systems

ExtractBench: A Benchmark for Schema-Guided Enterprise Document Extraction

ExtractBench Pro

ExtractBench Pro: long-tail document extraction challenges (LlamaIndex)

100 synthetic documents, 2,622 pages, 86 document types, six challenge groups

The best system completes 58 of 100 documents perfectly; several complete none

ExtractBench Pro leaderboard and challenge descriptions

Benchmark	Value	Tasks	Difficulty	Provenance
SWE-bench Pro SWE-bench Pro	89.9	1,865 repository problems	Long-horizon professional engineering	SWE-Bench Pro: Can AI Agents Solve Long-Horizon Software Engineering Tasks?
FrontierCode 1.1 Main FrontierCode 1.1 Main	54.4	100 private Main tasks (150 in Extended)	Frontier coding-agent quality	FrontierCode leaderboard
FrontierCode 1.1 Extended FrontierCode 1.1 Extended	63.6	150 private software-engineering tasks	Frontier coding-agent quality	FrontierCode leaderboard
SWE Multilingual SWE Multilingual	93.9	Multilingual software-engineering tasks	Professional software engineering	MiniMax M2.7: Early Echoes of Self-Evolution
SWE Multimodal SWE-bench Multimodal	61.4	Multimodal software engineering tasks	Frontier multimodal coding	SWE-bench Multimodal
ProgramBench ProgramBench: Can Language Models Rebuild Programs From Scratch?	91.2	200 program reconstruction tasks	Full-repository software architecture	ProgramBench: Can Language Models Rebuild Programs From Scratch?
FrontierSWE v2 FrontierSWE v2	62.3	34 ultra-long-horizon engineering and research tasks	Ultra-long-horizon frontier software engineering	FrontierSWE v2
Bug Hunt Bench Bug Hunt Bench	41.7	105 planted bugs across two production TypeScript repositories	Blind production-repository bug finding and repair	Bug Hunt Bench method, caveats, and definitions
AA-SciCode Artificial Analysis SciCode	66.9	Scientific coding subproblems	Scientific programming	Artificial Analysis SciCode Benchmark Leaderboard
DeepSWE DeepSWE	74.2	113 software engineering tasks across 91 repositories and 5 languages	Long-horizon software engineering	DeepSWE benchmark blog
PostTrainBench v1.1 PostTrainBench v1.1	49.3	Post-training Qwen3 1.7B and 4B, SmolLM3 3B, and Gemma3 4B	Frontier agent evaluation	PostTrainBench v1.1 leaderboard and methodology

Benchmark	Value	Tasks	Difficulty	Provenance
FrontierMath v2 (Tiers 1-3) FrontierMath v2 Tiers 1-3	91.228	285 private advanced mathematics problems	From olympiad-plus to early research mathematics	FrontierMath v2 benchmark hub
FrontierMath v2 (Tier 4) FrontierMath v2 Tier 4	95.000	41 private extreme-difficulty mathematics problems	Research-level mathematics requiring hours or days of expert work	FrontierMath Tier 4 v2 leaderboard
ArXivMath Aug. 2026 (no tools) ArXivMath August 2026 without tools	91.2	57 recent research-mathematics problems	Research mathematics	Claude Opus 5.5 System Card
ArXivMath Aug. 2026 (tools) ArXivMath August 2026 with tools	96.9	57 recent research-mathematics problems	Research mathematics	Claude Opus 5.5 System Card

Benchmark	Value	Tasks	Difficulty	Provenance
ARC-AGI-1 ARC-AGI-1 Semi-Private Evaluation	97.50	Semi-private ARC-AGI-1 evaluation set	Abstract visual reasoning	ARC Prize leaderboard
ARC-AGI-2 Abstraction and Reasoning Corpus for AGI v2	91.666667	Visual pattern completion and abstract reasoning	Expert-level — hardest public reasoning benchmark	ARC-AGI-2: A Harder General Intelligence Benchmark
AA-LCR Artificial Analysis Long Context Reasoning	84.7	Long-context reasoning tasks	Long-context reasoning	Artificial Analysis model benchmarks
MLCR-AA Medical Long Context Reasoning (MLCR-AA)	66.7	Long, fragmented medical-record reasoning	Long-context medical reasoning	Medical Long Context Reasoning (MLCR-AA)
CritPt Critical Physics Tasks	31.7	Research-level physics questions	Research-level physics reasoning	CritPt Benchmark Leaderboard
GraphWalks BFS 256K–1M GraphWalks BFS 256K–1M	66.8	Breadth-first-search graph traversal on 200 problems with context lengths from 256K to 1M tokens.	Frontier agent evaluation	Gemini 4 Argon evaluation methodology
STEMBench STEMBench120: six-domain scientific research progress	2.62	120 research tasks, 20 in each of six STEM domains	Open research targets; no run has reached a full-target success	STEMBench: six-domain model evaluation

Benchmark	Value	Tasks	Difficulty	Provenance
GMMLU Global MMLU	94.3	Knowledge questions across 42 languages	Multilingual knowledge	Global MMLU: Understanding and addressing cultural and linguistic biases in multilingual evaluation
MILU Multi-task Indic Language Understanding Benchmark	93.1	Knowledge tasks across 11 languages	Multilingual Indic knowledge	MILU: A Multi-task Indic language understanding benchmark

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Claude Opus 5.5

Capability shape

Capability evidence

Runtime service evidence

Endpoint and price matrix

Workload-aware monthly cost example

Benchmark record

Knowledge

Lifecycle and limitations log

Coding

Mathematics

Reasoning

Multilingual

Agentic

Multimodal & Grounded

Instruction Following

Benchmark	Value	Tasks	Difficulty	Provenance
LAB all-pass (Harvey held-out) Legal Agent Benchmark all-pass rate — Harvey held-out set	8.3	Harvey-held-out legal-agent tasks	Professional legal work	Claude Opus 5 System Card
LAB criterion-pass (Harvey held-out) Legal Agent Benchmark mean criterion-pass rate — Harvey held-out set	91.2	Harvey-held-out legal-agent tasks	Professional legal work	Claude Opus 5 System Card
Toolathlon Verified Pass@3 Toolathlon Verified Pass@3	82.4	108 verified real-world tool-use tasks	Long-horizon application tool use	Claude Opus 5 System Card
Toolathlon Verified Pass³ Toolathlon Verified Pass cubed	72.2	108 verified real-world tool-use tasks	Long-horizon application tool use	Claude Opus 5 System Card
Toolathlon Verified avg. turns Toolathlon Verified average assistant turns	26.9	108 verified real-world tool-use tasks	Long-horizon application tool use	Claude Opus 5 System Card
Terminal-Bench 4.0 Terminal-Bench 4.0	66.40	66 professional computer-work tasks	Frontier autonomous knowledge work	Terminal-Bench 4.0
Terminal-Bench-Science 0.1 Terminal-Bench-Science 0.1	58.7	70 expert-curated scientific research workflows	Frontier scientific research workflows	Terminal-Bench-Science 0.1
AA Briefcase Artificial Analysis Briefcase	1803	Professional knowledge-work tasks	Professional work	Artificial Analysis Briefcase Benchmark Leaderboard
AA AutomationBench Artificial Analysis AutomationBench	69.5	Business-process automation tasks	Agentic automation	Artificial Analysis AutomationBench Benchmark Leaderboard
AA Harvey LAB v1.0 Artificial Analysis Harvey LAB-AA v1.0	91.2	Legal agent tasks	Professional legal work	Artificial Analysis Harvey LAB-AA Benchmark Leaderboard
AA ITBench Artificial Analysis ITBench-AA	38.2	IT incident-response tasks	Enterprise IT operations	Artificial Analysis ITBench-AA Benchmark Leaderboard
HLE w/ tools Humanity's Last Exam with tools	67.7	Expert questions with tool use	Frontier tool-augmented reasoning	DeepSeek-V4 Technical Report
GDPval-AA GDPval-AA	1846	Agentic real-world work tasks	Professional agentic workflows	DeepSeek-V4 Technical Report
GDPval-AA GDPval-AA normalized	68.3	Economically valuable tasks	Professional agentic workflows	Artificial Analysis model benchmarks
AA Terminal-Bench 4.0 Artificial Analysis Terminal-Bench v4.0	59.6	Terminal-based agent tasks	Agentic software engineering	Artificial Analysis Terminal-Bench v4.0 Benchmark Leaderboard
GDP.pdf Artificial Analysis GDP.pdf	26.2	Professional document-production tasks	Professional knowledge work	GDP.pdf Benchmark Leaderboard
AA-AnalystAgent Artificial Analysis AnalystAgent	56.3	Spreadsheet and document analysis questions	Business and data analysis	AA-AnalystAgent Benchmark Leaderboard
OSWorld 2.0 OSWorld 2.0	48.7	108 long-horizon computer-use workflows	Long-horizon professional workflows	OSWorld2.0: Benchmarking Computer Use Agents on Long-Horizon Real-World Tasks
Toolathlon-Verified Toolathlon-Verified	77.8	Verified multi-tool workflows	Advanced tool use	Kimi K3: Open Frontier Intelligence
AutomationBench AutomationBench	40.0	600 public automation tasks	Long-horizon automation	Kimi K3: Open Frontier Intelligence
CWE-bench v1 CWE-bench v1	67.0	Audit and patch held-out C/C++, Go, Java, TypeScript/JavaScript, Python, and Rust repositories	Frontier agent evaluation	CWE-bench v1 leaderboard and methodology
Hermes Index Hermes Index: agentic capability and cost per task inside Hermes Agent	63.3	Four suites: Hermes Bench (150 tasks), TerminalBench 4 without its 4 GPU tasks, TerminalBench Science and SkillsBench	Frontier agentic	Hermes Index: an agentic model leaderboard
Hermes Bench Hermes Bench: 150 agent tasks graded on the files and state the agent leaves behind	76.7	150 tasks across 25 categories	Frontier agentic	Hermes Bench (Hermes Index)
MazeBench MazeBench: visual spatial reasoning in a 3D open world	13	100 hidden gems across 256 rooms in one open world	Long-horizon spatial planning, with single puzzles that can take over one hundred moves	MazeBench Results

Benchmark	Value	Tasks	Difficulty	Provenance
Chartography (no tools) Chartography without tools	64.4	100 specialized chart types	Professional chart reasoning	Chartography
Chartography (tools) Chartography with image and code tools	89.0	100 specialized chart types	Professional chart reasoning	Chartography
BenchCAD Vision2Code (no tools) BenchCAD Vision2Code voxel IoU without tools	0.730	1,000-file Vision2Code subset	Programmatic CAD generation	BenchCAD: A comprehensive, industry-standard benchmark for programmatic CAD
BenchCAD Vision2Code (tools) BenchCAD Vision2Code voxel IoU with tools	0.962	1,000-file Vision2Code subset	Programmatic CAD generation	BenchCAD: A comprehensive, industry-standard benchmark for programmatic CAD
OfficeQA OfficeQA	78.9	Historical Treasury Bulletin questions	Professional document reasoning	Claude Opus 5 System Card
AA-MMMU-Pro Artificial Analysis MMMU-Pro	87.7	Multimodal academic reasoning	Frontier multimodal	Artificial Analysis MMMU-Pro Benchmark Leaderboard
Design Arena Website Design Arena Website Elo	1335	Website generation comparisons	Design and website generation	OpenRouter Grok 4.3 benchmarks
OfficeQA Pro OfficeQA Pro	67.7	Document and spreadsheet tasks	Enterprise grounded reasoning	OfficeQA Pro: An Enterprise Benchmark for End-to-End Grounded Reasoning
Biomedical image analysis Anthropic biomedical-image-analysis evaluation	71.4	91 cases across 31 biomedical imaging tasks	Biomedical image analysis	Claude Opus 5.5 System Card
ParseBench ParseBench: document parsing for AI agents (LlamaIndex leaderboard)	79.85	2,078 human-verified enterprise pages from insurance, finance and government documents	No method is strong on all five dimensions; charts and visual grounding separate the field	ParseBench: A Document Parsing Benchmark for AI Agents
ExtractBench (LlamaIndex) ExtractBench: schema-guided enterprise document extraction (LlamaIndex leaderboard)	86.06	370 documents, 4,869 pages, 8 business domains, 67 document types, each with a JSON Schema	Short documents are near solved; long record lists and grounding separate systems	ExtractBench: A Benchmark for Schema-Guided Enterprise Document Extraction
ExtractBench Pro ExtractBench Pro: long-tail document extraction challenges (LlamaIndex)	51	100 synthetic documents, 2,622 pages, 86 document types, six challenge groups	The best system completes 58 of 100 documents perfectly; several complete none	ExtractBench Pro leaderboard and challenge descriptions