On June 30, 2026, Anthropic introduced Claude Sonnet 5, a new model tuned for agentic tasks, making it available the same day. It outperforms its predecessor on tool use across browsers and terminals and on multi-step autonomous work, while featuring lower cybersecurity risk by design than the company's top-tier models. Anthropic frames Sonnet 5 as its "most agentic Sonnet yet," saying it substantially exceeds the prior model on planning, tool use and autonomous multi-step work, delivering performance close to the flagship Opus 4.8 at Sonnet's speed and price tier, as described in its announcement.
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