Anthropic releases Sonnet 5.5, 30% faster and up to 30% cheaper than Sonnet 5

Coverage timeline

1. TechCrunch AILucas Ropek2 months ago
   Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partner

   Anthropic has released the newest version of its mid-range model, boasting faster response times and less token burn.

2. Techmeme2 months ago
   Anthropic releases Sonnet 5.5, saying it generates outputs 30%+ faster than Sonnet 5 and costs up to 30% less per task, and plans to release Haiku 5.5 soon (Anthropic)

   Anthropic : Anthropic releases Sonnet 5.5, saying it generates outputs 30%+ faster than Sonnet 5 and costs up to 30% less per task, and plans to release Haiku 5.5 soon — Sonnet 5.5 is a faster, lower-cost complement to Claude Opus 5.5. Where Opus 5.5 is built for complex work requiring careful judgment …

   
3. Simon Willison2 months ago
   Claude Sonnet 5.5

   Claude Sonnet 5.5 New Sonnet model from Anthropic today. They say it "runs 30%+ faster, and costs up to 30% less for most work" - it's priced the same as Sonnet 5 but appears to beat it on every benchmark, and should be cheaper to run as well. Here are some pelicans riding bicycles . Sonnet 5.5 suffered from the same bug as Opus 5.5 : the "max" thinking effort pelican thought for 128,000 tokens (at a cost of $1.28) before running out of tokens and failing to produce an SVG. Here's the pelican it gave me for thinking effort "xhigh", at a cost of 5.74 cents and taking 41 seconds: Sonnet 5.5 appears to be almost as good as Opus 5.5 on some coding tasks, including various viral 3D animation tricks . The most interesting thing about Sonnet 5.5 is that it's now the model used for the free tier on claude.ai . OpenAI's ChatGPT free tier uses Luna 5.6, which means Anthropic currently have a much more capable free offering. I ran this prompt against that free tier: build me an HTML page that ren

   
4. 机器之心机器之心2 months ago
   Claude Sonnet 5.5上线！一半价格，性能逼近Opus 5.5

   就在今天早上，Anthropic 正式发布了 Claude 5.5 家族的第二款模型 Claude Sonnet 5.5。 「相比前代 Claude Sonnet 5，5.5 有了明显提升，运行速度提高 30% 以上，在大多数工作中的成本最高可降低 30%。」 速度更快、成本更低的 Sonnet 5.5 ，将与 Claude Opus 5.5 形成互补。 Opus 5.5 专为需要审慎判断的复杂工作打造，Sonnet 5.5 则最擅长处理范围明确的日常任务、修复代码问题，以及制作精美的文档、幻灯片和电子表格。Sonnet 5.5 也具备敏锐的设计眼光。 与此同时，面向高调用量和成本敏感型应用的 Claude Haiku 5.5，将在未来几周加入 Claude 5.5 家族。 Claude Sonnet 5.5 现已在所有平台上线，包括 Amazon Web Services、Google Cloud 和 Microsoft Azure。开发者可以在 Claude Platform 上使用模型标识符 claude-sonnet-5-5 开始调用。 下面我们具体来看 Sonnet 5.5 的性能、成本与速度、安全与对齐。 性能表现 Sonnet 5.5 在各个领域都优于 Sonnet 5，部分领域的提升尤为显著。在多项评测中，采用 Max effort（最大努力程度）设置的 Sonnet 5.5，甚至能取得与 Opus 5.5 相当的表现。 Sonnet 5.5 在编程方面的性能提升尤为明显，其中在智能体编程评测 Terminal-Bench 4.0 上，Sonnet 5.5 的得分为 70.6%，Sonnet 5 为 10.3%。 在 FrontierCode 上，采用 High effort 设置的 Sonnet 5.5，比相同设置下的 Sonnet 5 高出 10 分，单项任务成本却只有后者的约十五分之一。在使用真实 Cursor 编程会话任务进行测试的 CursorBench 上，Sonnet 5.5 的最佳成绩与 Opus 5.5 相差约 2 分以内。 在覆盖多个职业真实工作任务的 GDPval-AA 测试中，Sonnet 5.5 的得分仅比 Opus 5.5 低 2 分，比 Sonnet 5 高约 400 分。这项评测使用的真实工作任务覆盖 9 个主要行业、