Introducing Claude Sonnet 5 \ Anthropic
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Our most agentic Sonnet yet, with top-tier intelligence for coding and everyday professional work.
Claude Sonnet 5 is built to be the most agentic Sonnet model yet. It can make plans, use tools like browsers and terminals, and run autonomously at a level that, just a few months ago, required larger and more expensive models. For many developers, the agentic AI era began with Sonnet-class models: Claude Sonnet 3.5, 3.6, and 3.7 were the first models that showed impressive skills in coding and tool use. More recently, though, the clearest gains in agentic capabilities have been in our Opus-class models. Sonnet 5 narrows the gap: its performance is close to that of Opus 4.8, but at lower…
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