Claude Sonnet 4.5 (2025-09-29)

Name: Claude Sonnet 4.5 (2025-09-29) on Anthropic
Brand: Anthropic
Availability: InStock

Latest Claude Sonnet with improved reasoning and extended thinking.

anthropic/claude-sonnet-4-5-20250929

Streaming

Vision

Tools

Reasoning

Reasoning Budget

Structured JSON

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Input

$3$2.85

/M tokens

Cache Read

$0.3$0.285

/M tokens

Output

$15$14.25

/M tokens

Cache Write 5m

$3.75$3.5625

/M tokens

Cache Write 1h

$6$5.7

/M tokens

+ $0.010$0.009 per search