Anthropic launches Claude Sonnet 5, closing the gap to the pricier Opus series

Anthropic 发布 Claude Sonnet 5，号称最智能体版本，逼近 Opus 系列

Anthropic released Claude Sonnet 5, calling it the most agentic Sonnet yet. It plans, uses browsers and terminals, and beats Sonnet 4.6 across all benchmarks. On the real-world knowledge work test GDPval-AA v2, it edges past Opus 4.8 with 1,618 vs 1,615 points. Agentic coding on SWE-bench Pro hits 63.2%, still behind Opus 4.8 at 69.2% but well above 4.6's 58.1%. Anthropic stressed it wasn't trained on cybersecurity tasks and scores far below blocked models Mythos 5 and Fable 5 on exploit writing. Real-time cyber safeguards are on by default. Available now at an introductory price until August 2026, then standard Sonnet rates apply.

Why it matters: Anthropic drops Claude Sonnet 5, pitched as its most agentic Sonnet yet. It sweeps Sonnet 4.6 on benchmarks and edges out the pricier Opus 4.8 on GDPval-AA v2 (1618 vs 1615). The post doesn't disclose SWE-bench agentic coding scores or pricing — those two numbers will determin...