Rohan Paul@rohanpaul_ai · XAnthropic 发布 Claude Sonnet 5，拥有 1M token 上下文窗口（此前泄露），编码能力显著提升：SWE-bench Pro 得分 63.2%，高于 Sonnet 4.6 的 58.1%；知识工作略超 Opus 4.8。Anthropic 称其为“最具智能体特性的 Sonnet 模型”。定价优惠至 8 月 26 日：输入 $2/1M tokens，输出 $10/1M tokens；之后涨至 $3/15。当前智能体编码得分 63.2%，与 Opus 4.8（69.2%）仍有差距，但低价策略大幅降低 agentic AI 成本。
And Claude Sonnet 5 just launched.
Closes the gap with Opus 4.8， and is cheap until August.
This makes agentic AI much cheaper， with $2 input tokens and $10 output tokens per 1M through Aug-26. Price rises after 08-26 to $3 input and $15 output per 1M.
They call Sonnet 5 its "most agentic Sonnet model yet，"
Its coding score hit 63.2% on SWE-bench Pro， versus 58.1% for Sonnet 4.6.
Sonnet 5 gets 63.2% in agentic coding， while Opus 4.8 reaches 69.2% and Sonnet 4.6 hits 58.1%.