Mythos 5.1 也同步在 Project Glasswing 中推出。
Mythos 5.1 也同步在 Project Glasswing 中推出。
Anthropic 表示，其最新 AI 模型 Fable 5.1 和 Mythos 5.1 针对客户关于价格、数据留存以及过度谨慎的安全防护措施的批评作出了回应。该公司声称，Claude Fable 5.1 的性能比 Fable 5 更强，但由于降低了对已处理和存储的缓存数据的定价，其成本通常降低约 25%，在复杂的智能体任务中最高可降低 45%。
伴随此次发布，大量早期体验反馈也随之涌现，其中包括 Every 公司 CEO Dan Shipper 的评价，他声称：“这是我们用过的最强的编程模型，但现在它速度快、token 效率高，而且关键是，它说话真的像正常人一样。”
Box 公司 CEO Aaron Levie 也是早期体验的认可者之一，他表示，其公司搭载 Fable 5.1 的智能体在数据中捕捉到了 Fable 5 在相同测试中遗漏的细微之处和模糊信息。与此同时，Lisan al Gaib 指出，在基准测试中，Mythos 5.1 在低推理设置下的得分与其前代产品在 Max 推理设置下的得分相同。
Fable 5.1 还配备了“更精准的安全防护”，Anthropic 称其相比 Fable 5 更不容易拦截基础生物学问题，但 Mythos 5.1 与上一代模型一样，保留了相同的生物学限制。Anthropic 还解释了其在数据留存方面的进展，称 Enterprise Frontier Safeguards 通过将数据存储在客户的云服务器上而非自家服务器上，提供“完全隐私保护”，并将于今年秋季晚些时候开始推出。
Anthropic 表示，“现在允许 Fable 5.1 用于识别软件漏洞”，但仍会将部分网络安全任务转交给 Opus 模型处理，例如“渗透测试、漏洞利用生成以及基于二进制的漏洞扫描”。Claude Fable 5.1 现已可在所有平台上使用，而 Mythos 5.1 仅向 Project Glasswing 参与者开放。
Mythos 5.1 is also launching in Project Glasswing.
Mythos 5.1 is also launching in Project Glasswing.
Anthropic says its newest AI models, Fable 5.1 and Mythos 5.1, address criticisms from customers about price, data retention, and overzealous safeguards. The company claims Claude Fable 5.1 offers stronger performance than Fable 5, but costs around 25 percent less typically and up to 45 percent less for complex agentic tasks, thanks to reduced pricing on cached data that was already processed and stored.
Along with the announcement, a slew of early impressions popped up, including from Every CEO Dan Shipper, who claims, “It’s the strongest coding model we’ve used, but now it’s fast, token-efficient, and crucially actually speaks like a normal person.”
Box CEO Aaron Levie is another early access believer, saying that his company’s agent with Fable 5.1 picked up on subtleties and ambiguities in data that Fable 5 missed in the same test. Meanwhile, Lisan al Gaib points out that on benchmarks, Mythos 5.1 with low reasoning scores the same as its predecessor set to Max reasoning.
Fable 5.1 also has “more precise safeguards” that Anthropic says are less likely to block basic biology questions than Fable 5, but Mythos 5.1 has the same biology restrictions as the previous model. Anthropic also explained its progress on data retention, saying that Enterprise Frontier Safeguards offer “complete privacy” by storing data on the customer’s cloud servers instead of its own, and will start rolling out later this fall.
Anthropic says it’s “now allowing Fable 5.1 to be used for identifying software vulnerabilities,” but it will still redirect some cybersecurity tasks to Opus models, like “penetration testing, exploit generation, and binary-based vulnerability scanning.” Claude Fable 5.1 is now available on all platforms, while Mythos 5.1 is available to Project Glasswing participants only.