Claude Sonnet 3.7

anthropic

The first hybrid reasoning model from Anthropic, combining standard responses with extended thinking mode. Sonnet 3.7 introduced transparent step-by-step reasoning and excelled at coding and front-end development. With 200K context, 64K output, and thinking capabilities, it bridged the gap between Claude 3.5 and Claude 4. This model has been retired and is no longer available for use.

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Capabilities

Tool Use

PDF Input

Extended Thinking

Image Input

Example Use Cases

Complex coding requiring step-by-step reasoning

Problems benefiting from visible thinking process

Front-end development and ui work

Technical Specifications

Context Window

200,000 tokens

Max Output

64,000 tokens

Cache Miss Cost

$3 per 1M tokens

Non-Reasoning Cost

$15 per 1M tokens

Cache Read Cost

$0.30 per 1M tokens

Cache Write Cost

$3.75 per 1M tokens

Web Search Cost

$15 per 1K calls

Code Execution Cost

$0.19 per 1K calls

⚠️ Legacy

Made legacy on

Reason

Retired model

Recommended Replacement

Claude Opus 4.6