Anthropic's Claude Sonnet 4.5 language-model release.
Pricing
Official site · Jun 23, 2026, 6:37 AM
Input / 1M
$3.00
Output / 1M
$15.00
Cached input / 1M
$0.30
Public API token pricing; cached input price included. Batch or other discounted programs, if any, are not included.
Anthropic's official pricing documentation is the intended first-party source for Claude Sonnet 4.5 pricing. Reported public API pricing is $3 per 1M input tokens and $15 per 1M output tokens, with cached input tokens at $0.30 per 1M. Confidence is low because web retrieval was unavailable in this run, so the finding is based on the official pricing URL and product naming only.
Model Intelligence
Arena ranking
8
Benchmarkable
Yes
Model level
release
Intelligence Index
8.3
Coding Index
26
MMLU Pro
0.75
GPQA
0.56
HLE
0.04
SciCode
0.32
MATH-500
0.7
AIME
0.1
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