Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
One change · api

intro changed

intro

Nearest release: v2.1.258, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
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First seen 14 Aug 2026 this site's first read of the page
Recorded edits8to this page, all time

The whole hunk

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77<Tip>
88 The latest generation of Claude models:
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10 **Claude Fable 5.1** - For demanding reasoning and long-horizon agentic work. Read the [Claude Fable 5.1 announcement](https://www.anthropic.com/claude/fable/5-1).
10 **Claude Fable 5.1** - For demanding reasoning and long-horizon agentic work. Read the [Claude Fable 5.1 announcement](https://www.anthropic.com/claude-fable-and-mythos-5-1).
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1212 **Claude Mythos 5.1** - Offers Claude Fable 5.1's capabilities by invitation through [Project Glasswing](https://anthropic.com/glasswing).
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