Claude Opus 4.5
Intelligent, efficient, and the best model in the world for coding, agents, and computer use.
Claude Opus 4.5 is Anthropic’s November 2025 Opus-tier Claude model release for coding, agents, computer use, reasoning, deep research, and professional work, available through Claude apps, the Claude API, and major cloud platforms.
Pricing
Official site · Aug 13, 2026, 1:08 PM
Input / 1M
$5.00
Output / 1M
$25.00
Cached input / 1M
$0.50
Also lists prompt cache writes at $6.25/MTok for 5m cache writes and $10/MTok for 1h cache writes. Prices are USD per MTok (million tokens).
Anthropic's official Claude Platform pricing page lists Claude Opus 4.5 at $5 per million base input tokens and $25 per million output tokens, with cache hits/refreshes at $0.50 per million tokens.
Model Intelligence
Context window
200,000 tokens
Arena ranking
36
Benchmarkable
Yes
Model level
release
Intelligence Index
35.6
Math Index
62.7
MMLU Pro
0.89
GPQA
0.81
HLE
0.13
LiveCodeBench
0.74
SciCode
0.47
AIME 2025
0.63
IFBench
0.43
LCR
0.67
TerminalBench Hard
0.41
TAU2
0.86
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