# Fable 5 回归但伴随严格限制

- 来源：Chubby♨️ (@kimmonismus)
- 发布时间：2026-07-01 14:44
- AIHOT 分数：60
- AIHOT 链接：https://aihot.virxact.com/items/cmr1putuo00wqsl8zalloo9rt
- 原文链接：https://x.com/kimmonismus/status/2072209771898225069

## AI 摘要

Anthropic 的 Fable 5 模型于 7 月 1 日全球重新上线，Mythos 5 仅限美国获批组织使用。新的安全分类器可阻止超 99% 的特定报告技术，但代价是正常编码和调试中误报增加，被拦截的请求将转至 Opus 4.8。截至 7 月 7 日，Fable 5 包含在每周使用限额的 50% 内，之后需消耗使用积分。作者认为严格限制下更难有效使用 Fable 5，且更多科学问题（生物学、化学）也会被拦截。

## 正文

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.

### 引用推文

> Chubby♨️：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 Anthr...