# 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...