AI 精选动态
智能评分 85
Fable 5回归但有限制
AI 推荐理由
新分类器在提升安全性同时显著增加误判，可能对科研和编码工作流产生实质性影响，值得关注后续使用反馈。核心解读
Anthropic 恢复上线 Fable 5 模型，引入新安全分类器阻挡特定技术超过 99% 的案例，但代价是编码和调试中正常请求误判增加，并将被拦请求路由至 Opus 4.8。7月7日前每周使用额度 50%，之后按积分使用。
全文
Fable 5 is back, but with a major caveat.
Coding is being handled even more restrictively and routed even more heavily to Opus 4.8. Specifically, it says: "The new classifier also comes at the cost of flagging benign requests more often during routine coding and debugging tasks."
As a result, I do not just assume that it will become even harder to use Fable 5 effectively; I actually think that significantly more scientific questions, including those about biology and chemistry, will be blocked as well.
So it is a mixed re-release, but we will see.
> **引用原帖 Chubby♨️ (@kimmonismus):**
> Fable 5 is back, globally!
> Fable 5 returns globally on July 1, while Mythos 5 is only restored for approved US organizations.
> A new safety classifier that Anthropic says blocks the specific reported technique in over 99% of cases, with blocked Fable 5 requests routed to Opus 4.8.
> Anthropic admits the tradeoff is more false positives for normal coding and debugging.
> Fable 5 will be included for up to 50% of weekly usage limits through July 7, after which it will be available via usage credits.
> https://x.com/kimmonismus/status/2072199399833240054