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How to Use Claude Sonnet 5 API

This story is from 2026-09-21. It is preserved in the archive; the latest stories are on the live feed.

Quick Answer Claude Sonnet 5 API is Anthropic's new Sonnet-class model for coding agents, long-context reasoning, tool use, and professional knowledge work. Anthropic announced Claude Sonnet 5 on June 30, 2026, positioning it as the most agentic Sonnet model yet and a major upgrade from Claude Sonn…

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  1. 2026-09-21 02:55 · DEV Community — AI
    How to Use Claude Sonnet 5 API

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