Claude Fable 5 是我们首个普遍可用的 Mythos-class 模型。 它搭载了新的安全分类器,可能会标记网络和生物等双重用途领域的某些提示词。 我们增加了回退机制:被拒绝的请求会在 Claude Opus 4.8 上重试,而不是直接终止。
Claude Fable 5 is our first generally available Mythos-class model.
It ships with new safety classifiers that may flag certain prompts in dual-use domains like cyber and bio.
We've added fallbacks: a refused request retries on Claude Opus 4.8 instead of dead-ending.