Introducing Claude Sonnet 5
Anthropic released Claude Sonnet 5, calling it the most agentic Sonnet model yet, with performance approaching Opus 4.8 on reasoning, tool use, and coding tasks at a lower price. It is the default model for Free and Pro users and is available in Claude Code, Cowork, and the API at introductory pricing of $2/$10 per million input/output tokens through August 31.
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