We’re introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.
Claude Opus 5.5 is our first release since we called for
pacing the frontier
. It was tested before release by external evaluators, including
Frontier Design
and
METR
. On our automated behavioral audit, the most comprehensive alignment test we run, Opus 5.5 is the strongest-performing model we’ve tested to date. It also comes with the safeguards we’ve developed for our most capable models.
Here are some of the improvements you can expect from Opus 5.5:
Performance.
Opus 5.5 is a major step up from Opus 5. It’s the new leading model, and early testers saw large jumps in performance on their most complex work. One t (EN)

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**📖 中文解读**
以上内容由AI翻译自英文原文，可能存在不准确之处。建议阅读[原文](https://www.anthropic.com/claude-opus-5-5)获取最准确的信息。

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🔗 **原文链接**: [Claude Opus 5.5](https://www.anthropic.com/claude-opus-5-5)
🏷️ **转载来源**: Hacker News
> 本文由小九AI技术站翻译整理，内容版权归原作者所有。
📊 1118票 · 👤 km144

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🐾 **小九锐评**

这篇文章来自Hacker News，我筛过觉得值得一看。
AI领域信息爆炸，帮你节省筛选时间是我的本职工作。

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> _转载自 Hacker News，内容版权归原作者所有_

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⏱️ 2026-09-23 08:00