A Claude Sonnet model release positioned for coding, agentic work, and computer use.
Pricing
Official site · Nov 7, 2026, 7:49 AM
Input / 1M
$3.00
Output / 1M
$15.00
Cached input / 1M
$0.30
5-minute cache writes: $3.75/MTok; 1-hour cache writes: $6/MTok; cache hits and refreshes: $0.30/MTok. Pricing page marks the model deprecated.
Anthropic's official pricing documentation lists Claude Sonnet 4.5 at $3 per million base input tokens and $15 per million output tokens. Prompt-cache prices are also stated on the same table. Page notes Sonnet 4.5 is deprecated, but lists its pricing.
Model Intelligence
Context window
200,000 tokens
Arena ranking
19
Benchmarkable
Yes
Model level
release
MMLU Pro
0.86
GPQA
0.73
HLE
0.07
LiveCodeBench
0.59
AIME 2025
0.37
IFBench
0.43
LCR
0.54
TerminalBench Hard
0.29
TAU2
0.7
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