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title: Claude Fable 5.1 and Claude Mythos 5.1
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# Claude Fable 5.1 and Claude Mythos 5.1

## TL;DR
（要約なし・原文はリンク先を参照 / No summary available; see the source link.）

## Key Points
- (なし)

## Details
(本文なし。リンク先参照)

## Source
元記事: [Claude Fable 5.1 and Claude Mythos 5.1](https://www.anthropic.com/claude-fable-and-mythos-5-1) — published 2026-09-01T17:53:53Z