Claude Opus 5.5

Proprietarygeneralreasoningcodingagent

Leaderboard Score

66.8

Scale: 0 - 100

Throughput Speed

42 tps

Context Window

API Pricing / 1M

$5.00

Parameter Scale

Proprietary

Verified AI Radar & Benchmarks•8 Evaluated Metrics

Capability Radar & Benchmark Scores

Multi-Axis Capability Radar

Comparing Claude Opus 5.5 against Frontier Top 10 & Open-Source average

0 - 100 Scale

Claude Opus 5.5

Frontier Top 10 Avg

Open-Source Avg

Performance Vectors

Where Claude Opus 5.5 Leads

Coding & SWETop 10: 79.1% • OS: 47.6%

86.2%+7.1% vs Top 10

Reasoning & MathTop 10: 74.6% • OS: 46.6%

88.5%+13.9% vs Top 10

Agent & Tool AutomationTop 10: 71.2% • OS: 31.9%

78.4%+7.2% vs Top 10

Terminal & CLI ExecutionTop 10: 80.4% • OS: 47.6%

86.2%+5.8% vs Top 10

MMLU & Knowledge QATop 10: 50% • OS: 86.7%

83.5%+33.5% vs Top 10

Cyber & Security ExploitsTop 10: 87.8% • OS: 80.6%

63.5%-24.3% vs Top 10

All Verified Benchmark Evaluations

Direct Pass@1 and resolution rates across standardized evaluations.

CodingReasoningAgenticMath

Featured Compute Platform

Run Benchmarks on Dedicated AI Clusters

Zero-cold-start inference endpoints with dedicated GPU instances.

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Executive Analysis & Verdict

Claude Opus 5.5 by Anthropic is the pinnacle frontier intelligence model scoring 66.8 overall, leading global evaluations with 57.6 on the Artificial Analysis Intelligence Index and 1822 Elo on AA-Briefcase.

Key Strengths & Highlights

•#1 Global Intelligence on Artificial Analysis Intelligence Index (57.6) and AA-Briefcase Elo (1822)
•Unmatched agentic software engineering with 86.2% on SWE-bench and 86.2% on Terminal-Bench
•Massive 1M token context window with high-reliability reasoning and multi-turn instruction adherence

Limitations & Considerations

•Compute-heavy deliberate reasoning results in lower throughput (42 tps) compared to lighter Sonnet tiers

Recommended Workflows

The most demanding enterprise coding agents, advanced mathematical proofs, architectural refactoring, and multi-hour autonomous agent tasks

The New Frontier in Autonomous Intelligence

Claude Opus 5.5 represents Anthropic’s most advanced reasoning and autonomous coding model. Positioned at the very top tier of global AI capabilities, it is designed specifically for complex software development, deep scientific research, and long-horizon multi-agent workflows.

Key Specifications

Provider: Anthropic
License / Weights: Proprietary
Context Window: 1,000,000 tokens (1M)
Max Output: 128,000 tokens
Inference Speed: 42 tps
API Pricing: $5.00 / 1M input tokens ($25.00 / 1M output tokens, $0.50 cache read)

Benchmark Highlights

Overall Score: 66.8 / 100
Artificial Analysis Intelligence Index: 57.6 (#1 Globally)
AA-Briefcase Elo: 1822 (#1 Globally)
SWE-bench Verified: 86.2%
GPQA Diamond: 88.5%
MATH-500: 89.2%
Terminal-Bench: 86.2%
OSWorld: 78.4%

Frequently Asked Questions About Claude Opus 5.5

What is Claude Opus 5.5 and who developed it?↓

Claude Opus 5.5 is a proprietary large language model developed by Anthropic. It ranks #2 on the RankLLMs composite leaderboard, ahead of 99% of the 85 models we track, with an overall score of 66.8 / 100.

What context window and inference speed does Claude Opus 5.5 offer?↓

Claude Opus 5.5 supports a NaNK-token input context window and generates about 42 tps tokens per second in our reference measurements and suitable for extended reasoning sessions and multi-turn agent workflows..

Why does Claude Opus 5.5 cost more than most alternatives?↓

Claude Opus 5.5 sits in the premium tier at $5.00 per 1M tokens - cheaper than only 94% of priced models we track. That pricing buys frontier-tier benchmark results; the cost-per-solved-task math in our best-coding-LLM guide shows when it pays off.

What is Claude Opus 5.5 best at?↓

Claude Opus 5.5 is strongest in #1 Global Intelligence on Artificial Analysis Intelligence Index (57.6) and AA-Briefcase Elo (1822); Unmatched agentic software engineering with 86.2% on SWE-bench and 86.2% on Terminal-Bench; Massive 1M token context window with high-reliability reasoning and multi-turn instruction adherence. Full pillar-by-pillar numbers are in the benchmark tables above.

What should you watch out for with Claude Opus 5.5?↓

Known trade-offs include: Compute-heavy deliberate reasoning results in lower throughput (42 tps) compared to lighter Sonnet tiers. Weigh these against the strengths above for your specific workload.