Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),...
anthropic/claude-sonnet-4Claude Sonnet 4 is an API model from Anthropic, released on May 22, 2025, with a context window of 200,000 tokens, pricing of $3 per million input tokens and $15 per million output tokens. It accepts file, image, text input and produces text output.
At listed prices, a request with 10,000 input tokens and 1,000 output tokens costs about $0.045.
Specs are sourced from OpenRouter and were last checked on Sep 25, 2026. Always confirm current pricing and limits with the provider before production use.
Claude Sonnet 4 supports a context window of 200,000 tokens.
Claude Sonnet 4 is listed at $3 per million input tokens and $15 per million output tokens on OpenRouter.
Claude Sonnet 4 was published on May 22, 2025.
Claude Sonnet 4 accepts file, image, text input and produces text output.