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Claude Opus 4.5

Claude Opus 4.5 is an AI model from Anthropic.

Publisher
Anthropic
Family
Claude
Context
200K
Input
Output
License
proprietary
Released
24 Nov 2025

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Notes

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Attribution

Attribution policy →
Context
200K
Weights
Closed
API only
Input
$5
/1M tok
Output
$25
/1M tok
Blended
$10
#480/ 499/1M · 3:1
Speed
0
#103/ 498tok/s
Cache read
$0.50
0.10x input
Cache write
$6.25
1.25x input

Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter

Reasoning effortIndexSpeed
Reasoning29.10 t/s
Non-reasoning23.70 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers

Reported on 41 evals across 14 domains - best 100.0% on Nsa Codebreaker · #1 of 4

Reported eval scores

41
Terminal Bench 2 Verified61.8
Skillsbench45.3
Nsa Codebreaker100
Browser Nav Challenge16.7
Hanabi12.1
Infraresolutionbench83.5
Curvebench Env35.6
Curvebench Hard Env6.1
OfficeQA37.4
SWE-bench Verified79.2
LiveCodeBench87.1
PubMedQA: A Dataset for Biomedical Research Question Answering77.5
MMLU-Pro89.5
LiveBench78.1
Humanity's Last Exam (HLE)30.1
Terminal-Bench (Hard)47
LiveBench - Coding79.7
LiveBench - Language81.3
LiveBench - Math90.4
SWE-bench Multilingual70.7

Head-to-heads

29

benchmark comparisons against other models

vs GPT-5.235 shared evalsvs Claude Sonnet 4.534 shared evalsvs GPT-5 Mini31 shared evalsvs Grok 4.1 Fast29 shared evalsvs Gemini 3.1 Pro Preview28 shared evalsvs Claude Opus 4.628 shared evalsvs GPT-5.428 shared evalsvs DeepSeek V3.227 shared evalsvs GPT-5 Nano26 shared evalsvs Claude 4 Sonnet26 shared evalsvs Kimi K2.526 shared evalsvs GPT-5.525 shared evalsvs GLM 4.725 shared evalsvs GPT-5.4 Mini25 shared evalsvs Claude Opus 4.824 shared evalsvs Claude Opus 4.724 shared evalsvs Gemini 2.5 Pro24 shared evalsvs GPT-523 shared evalsvs Claude Fable 523 shared evalsvs GLM 5.123 shared evalsvs Claude Sonnet 4.623 shared evalsvs Qwen3.6 Plus22 shared evalsvs gpt-oss-120b21 shared evalsvs GPT-4o18 shared evalsvs GPT-4.1 Mini16 shared evalsvs GPT-4.116 shared evalsvs GPT-4o-mini15 shared evalsvs GPT-4.1 Nano15 shared evalsvs GPT-6 Astra11 shared evals