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Claude Opus 4.5

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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
Input
$5
/1M tok
Output
$25
/1M tok
Blended
$10
#435/ 458/1M · 3:1
Speed
50
#195/ 458tok/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

Reported on 39 evals across 13 domains - best 100.0% on Nsa Codebreaker · #1 of 4

Reported eval scores

39
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
LiveCodeBench73.8
PubMedQA: A Dataset for Biomedical Research Question Answering77.5
MMLU-Pro88.9
LiveBench78.1
Humanity's Last Exam (HLE)12.9
LiveBench - Coding79.7
LiveBench - Language81.3
LiveBench - Math90.4
Terminal-Bench (Hard)40.9
SWE-bench Multilingual70.7