insight Simon Willison 2026-09-28T22:07 正文 ok 236 words

Anthropic 发布 Claude Sonnet 5.5:速度提升逾 30%,多数任务成本最多降低 30%

英文标题:Claude Sonnet 5.5

Anthropic 发布 Claude Sonnet 5.5,定价与 Sonnet 5 相同,但宣称运行速度提升超过 30%,且多数工作负载的成本最多可降低 30%。该模型在各项基准测试中似乎全面超过 Sonnet 5,并在部分编程任务上接近 Claude Opus 5.5 的表现。Sonnet 5.5 现已成为 claude.ai 的免费版模型,文章认为这使 Anthropic 的免费产品目前比采用 Luna 5.6 的 ChatGPT 免费版更具能力。测试显示,该模型在高推理强度下可生成较高质量的图形结果,但“max”推理模式仍会因过度思考耗尽 token 而失败。
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中文

2026 年 9 月 28 日-Link Blog

Claude Sonnet 5.5。Anthropic 今天推出了新的 Sonnet 模型。该公司称,它“运行速度提升超过 30%,且对大多数工作而言成本最多降低 30%”——其定价与 Sonnet 5 相同,但似乎在每一项基准测试中都胜过 Sonnet 5,运行成本也应当更低。

这里有一些骑自行车的鹈鹕。Sonnet 5.5 遭遇了与 Opus 5.5 相同的 bug:在“max”推理强度下,鹈鹕任务思考了 128,000 个 token(成本为 1.28 美元),随后因 token 耗尽而未能生成 SVG。

以下是它在“xhigh”推理强度下生成的鹈鹕:成本为 5.74 美分,耗时 41 秒:

效果不错——自行车车架正确,双腿位于车架两侧,脚踩在踏板上,链条位置也正确;不过它戴着一顶变形的蓝色自行车头盔。

Sonnet 5.5 在一些编程任务上的表现似乎几乎可与 Opus 5.5 媲美,其中包括多种爆红的 3D 动画技巧。

Sonnet 5.5 最有意思的一点,是它如今成为 claude.ai 免费版所使用的模型。OpenAI 的 ChatGPT 免费版使用 Luna 5.6,这意味着 Anthropic 目前提供了能力强得多的免费服务。

我在该免费版中运行了以下提示词:

build me an HTML page that renders a three-dimensional pelican riding a bicycle using WebGL

并得到了这个页面,成果相当扎实。

Anthropic 的公告再次表示,Haiku 5.5 将在“未来几周内”推出。我非常希望它能在价格上与 GPT-6 Luna 竞争!

English / 原文

28th September 2026 - Link Blog

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:

It's good- correct bicycle frame, legs either side of the frame, feet touching the pedals, chain in the right place, it is wearing a misshapen blue bicycle helmet though.

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 renders a three-dimensional pelican riding a bicycle using WebGL

And got back this page, which is a solid effort.

Anthropic's announcement reiterates that Haiku 5.5 will be available "in the coming weeks". I really hope that one is price-competitive with GPT-6 Luna!