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: v2.1.257, published under an hour before 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
Lines+2added
Lines−2removed
From line 7 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits8to this page, all time

The whole hunk

from line 7, old and new numbered
/
lines
from line 7
77<Tip>
88 The latest generation of Claude models:
99 
10 **Claude Fable 5** - Next-generation intelligence for long-running agents. Read the [Claude Fable 5 and Claude Mythos 5 announcement](https://www.anthropic.com/news/claude-fable-5-mythos-5).
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).
1111 
12 **Claude Mythos 5** - Shares Claude Fable 5's capabilities without the safety classifiers. Available in limited release through [Project Glasswing](https://anthropic.com/glasswing).
12 **Claude Mythos 5.1** - Offers Claude Fable 5.1's capabilities by invitation through [Project Glasswing](https://anthropic.com/glasswing).
1313 
1414 **Claude Opus 5** - For complex agentic coding and enterprise work. Read the [Claude Opus 5 announcement](https://www.anthropic.com/news/claude-opus-5).
1515