Anthropic launches Opus 5

Anthropic 发布 Opus 5

On Friday, Anthropic launched its Opus 5 model, the newest version of its long-standing heavyweight model. While smaller than Fable 5, the model will be both cheaper and less restrictive than Fable, likely making it preferable in most use cases. Notably, Opus 5 actually outperforms Fable 5 on a number of benchmarks included in the announcement.

周五，Anthropic 发布了其 Opus 5 模型，这是其长期以来的重量级模型的最新版本。虽然 Opus 5 的规模比 Fable 5 小，但它不仅价格更低，而且限制也更少，这使得它在大多数使用场景中可能更具优势。值得注意的是，在公告中列出的多项基准测试中，Opus 5 的表现实际上优于 Fable 5。

Opus 5 is launching only two months after Opus 4.8, which became available on May 28. Mythos 5, Fable 5, and Sonnet 5 all launched in June, leaving only the lightweight Haiku model still waiting for an upgrade to the 5 series.

Opus 5 的发布距离 5 月 28 日推出的 Opus 4.8 仅过去了两个月。Mythos 5、Fable 5 和 Sonnet 5 均于 6 月发布，目前仅剩下轻量级的 Haiku 模型还在等待升级到 5 系列。

In a post announcing the new model, Anthropic emphasized that Opus 5 was “much stronger at verifying its work and iterating carefully until it succeeds,” citing benchmark testing, in which Opus 5 wrote its own computer vision pipeline in response to an incomplete prompt, among other examples.

在宣布该新模型的文章中，Anthropic 强调 Opus 5 在“验证自身工作并进行仔细迭代直至成功”方面表现得“强大得多”。文中引用了基准测试作为例证，其中 Opus 5 在面对一个不完整的提示词时，能够自行编写计算机视觉流水线。

Crucially, Opus 5 is also free from many of the restrictions that have dogged Fable since its release. Like its predecessor, Opus 5 is not subject to the 30-day data retention policy that covers Fable and Mythos, which had raised concerns among some privacy-conscious users.

至关重要的是，Opus 5 还摆脱了许多自 Fable 发布以来一直困扰它的限制。与前代产品一样，Opus 5 不受适用于 Fable 和 Mythos 的 30 天数据保留政策的约束，该政策此前曾引起一些注重隐私的用户的担忧。

There are still meaningful safeguards on Opus, particularly around cybersecurity tasks like exploit generation and penetration testing. For instance, Opus 5 safeguards prevent it from being used to scan for vulnerabilities in a software binary, although it is permitted to search for vulnerabilities in source code, since the latter task is more likely to be used for defensive purposes.

Opus 仍然保留了有效的安全防护措施，特别是在漏洞利用生成和渗透测试等网络安全任务方面。例如，Opus 5 的防护机制禁止其被用于扫描软件二进制文件中的漏洞，但允许其在源代码中搜索漏洞，因为后者更有可能用于防御目的。

Broadly, Anthropic expects these classifiers to engage 85% less often for Opus 5 than they will for Fable 5, a reflection of the lighter touch given to the less capable model. Anthropic is also rolling out a new tool to make the safeguards less disruptive when they do engage. Users can now opt in to a beta feature called Automatic Fallbacks, which will automatically route requests to a less powerful model when a prompt triggers the safety classifier. The result is that API users with the setting engaged will get a functional response instead of an error message.

总体而言，Anthropic 预计这些分类器在 Opus 5 上的触发频率将比 Fable 5 低 85%，这反映出对能力较弱的模型采取了更宽松的限制。Anthropic 还推出了一款新工具，旨在降低安全防护措施触发时的干扰。用户现在可以选择加入名为“自动回退”（Automatic Fallbacks）的测试功能，当提示词触发安全分类器时，该功能会自动将请求路由至一个能力较弱的模型。这样一来，开启此设置的 API 用户将获得功能性的响应，而不是错误提示。