Build advanced reasoning agents with Claude Sonnet 3.7, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $15.00/1M input and $75.00/1M output tokens, native tool calling support. Access Claude Sonnet 3.7 via the OpenRouter API with up to 128K output tokens.
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Claude Sonnet 3.7 by OpenRouter costs $15.00 per 1M input tokens and $75.00 per 1M output tokens. Cached reads cost $1.50 per 1M tokens. Cache writes cost $18.75 per 1M tokens.