Claude Sonnet 4.5
The best coding model in the world
A Claude Sonnet model release positioned for coding, agentic work, and computer use.
Pricing
Official site · Nov 12, 2026, 7:30 AM
Input / 1M
$3.00
Output / 1M
$15.00
Cached input / 1M
$0.30
Prices per million tokens (MTok). Prompt-cache writes: $3.75/MTok for 5-minute writes and $6/MTok for 1-hour writes. Pricing page marks Sonnet 4.5 deprecated.
Anthropic's official pricing documentation explicitly lists Claude Sonnet 4.5 at $3 per million input tokens and $15 per million output tokens. Cached input reads are listed at $0.30 per million; standard 5-minute and 1-hour cache write rates are $3.75 and $6 per million respectively.
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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