Anthropic: Claude 3.7 Sonnet

Going away May 5, 2026

anthropic/claude-3.7-sonnet

Released Feb 24, 2025200,000 context

$3/M input tokens$15/M output tokens$10/K web search

Claude 3.7 Sonnet is an advanced large language model with improved reasoning, coding, and problem-solving capabilities. It introduces a hybrid reasoning approach, allowing users to choose between rapid responses and extended, step-by-step processing for complex tasks. The model demonstrates notable improvements in coding, particularly in front-end development and full-stack updates, and excels in agentic workflows, where it can autonomously navigate multi-step processes.

Claude 3.7 Sonnet maintains performance parity with its predecessor in standard mode while offering an extended reasoning mode for enhanced accuracy in math, coding, and instruction-following tasks.

Providers for Claude 3.7 Sonnet

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for Claude 3.7 Sonnet

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Effective Pricing for Claude 3.7 Sonnet

Actual cost per million tokens across providers over the past hour

Apps using Claude 3.7 Sonnet

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Recent activity on Claude 3.7 Sonnet

Total usage per day on OpenRouter

Prompt

1.32B

Completion

46.2M

Reasoning

918K

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for Claude 3.7 Sonnet

Uptime stats for Claude 3.7 Sonnet across all providers

Sample code and API for Claude 3.7 Sonnet

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

Claude 3.7 Sonnet - API Pricing & Providers | OpenRouter