Claude Opus 4.5

Name: Claude Opus 4.5
Author: Anthropic

Closed

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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Attribution

Benchmark scores: frontiermathAA prime-hub LiveBench SWE-bench OpenReward AfterQuery Vals AI EQ-Bench

Attribution policy →

Context

200K

Input

/1M tok

Output

$25

/1M tok

Blended

$10

#444/ 461/1M · 3:1

Speed

#115/ 461tok/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 effort	Index	Speed
Reasoning	41.9	0 t/s
Non-reasoning	35.6	0 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

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)13.2

LiveBench - Coding79.7

LiveBench - Language81.3

Terminal-Bench (Hard)40.9

LiveBench - Math90.4

SWE-bench Multilingual70.7