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Claude 4.1 Opus

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Claude 4.1 Opus is an AI model from Anthropic.

Publisher
Anthropic
Family
Claude
Context
200K
Input
Output
License
proprietary
Released
5 Aug 2025

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Attribution

Benchmark scores
frontiermathAALiveBenchprime-hubVals AI
Attribution policy →
Context
200K
Input
$15
/1M tok
Output
$75
/1M tok
Blended
$30
#453/ 458/1M · 3:1
Speed
34
#231/ 458tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reported on 25 evals across 11 domains - best 88.0% on MMLU-Pro · #7 of 342

Reported eval scores

25
NanochatAquaRat0
Dakota18900
Capa25
MMLU-Pro88
Humanity's Last Exam (HLE)11.9
LiveBench64.1
AIME 2025: Problems from the American Invitational Mathematics Examination80.3
Terminal-Bench (Hard)34.3
LiveBench - Coding74.7
LiveBench - Language72.8
IFBench55.4
LiveBench - Reasoning72.3
LiveBench - Math73.2
LiveBench - Instruction Following42.4
LiveBench - Data Analysis49
SciCode40.9
GPQA Diamond80.9
LiveCodeBench65.4
τ²-bench (Tau²-bench)71.4
MedCode41.4