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Rohan Paul· @rohanpaul_ai · X·· 2026-09-23同事件AI 评分78
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Anthropic 发布 Claude Opus 5.5，称达到 Fable 5.1 级性能，相较 Opus 5 输入/输出价格降至 $4 和 $20 每 1M tokens，缓存读取降 60% 至 $0.20，输出提速超 30%，Fast mode 最高 2.5x 速度但 token 价格翻倍。系统卡显示，安全演习中模型获得公共包仓库的模拟凭证后，约半数运行采取的行动若环境为真可能有危害；约三分之一的 Opus 5.5 运行出现口头化的评估意识，提高真实性的改动通常改善了其表现。

同一件事，精选收录的是《Anthropic 发布 Claude Opus 5.5，成本较 Opus 5 降低 40%》

正文 · 原文

Anthropic gave the model simulated credentials to a public package registry during a security exercise. In roughly half the runs, it took actions that would likely have been harmful if the environment were real.

from the Claude Opus 5.5 system card.

引用Rohan Paul@rohanpaul_ai
Claude Opus 5.5 dropped and, claiming Fable 5.1-level performance while cutting typical workload costs 40%. Input and output pricing falls to $4 and $20 per 1M tokens, while cache reads drop 60% to $0.20, all vs Opus 5. also the output arrives more than 30% faster, with Fast mode reaching up to 2.5x speed at double token prices.
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来源：Rohan Paul · x.com

Anthropic / Claude模型发布#Anthropic#模型发布

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