Anthropic 发布 Claude Sonnet 5，性能接近 Opus 且价格更低
原标题：ProductJun 30, 2026Introducing Claude Sonnet 5Sonnet 5 delivers frontier performance across coding, agents, and professional work at scale.
AI 摘要
Anthropic 发布了 Claude Sonnet 5，这是其最强大的代理型 Sonnet 模型，在编码、代理任务和专业工作中表现出色，性能接近 Opus 4.8 但价格更低。该模型即日起在所有计划中可用，并通过 Claude API 提供，具有限时优惠定价。早期合作伙伴反馈显示其在复杂任务中的自主性和效率显著提升，安全评估也显示其不良行为率低于前代。
正文节选
Introducing Claude Sonnet 5 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 capabilitie