A Claude Sonnet language model release from Anthropic.
Pricing
Official site · May 13, 2026, 1:09 PM
Input / 1M
$3.00
Output / 1M
$15.00
Cached input / 1M
$0.30
Cached-input rate recorded as the prompt-caching/cached-input price shown on Anthropic pricing materials.
Anthropic’s official pricing/docs pages are the canonical first-party sources for Claude Sonnet 4.5. The public token pricing is listed as $3 per 1M input tokens, $15 per 1M output tokens, and $0.30 per 1M cached input tokens.
Model Intelligence
Arena ranking
37
Benchmarkable
Yes
Model level
release
Intelligence Index
37.1
Coding Index
33.5
Math Index
37
MMLU Pro
0.86
GPQA
0.73
HLE
0.07
LiveCodeBench
0.59
SciCode
0.43
AIME 2025
0.37
IFBench
0.43
LCR
0.51
TerminalBench Hard
0.29
TAU2
0.7
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