CATCH #1100
DETECTED SEP 1, 2026 18:27 UTC
THE CATCHscore 10/10
EXHIBIT 1100 · FLASH
Sep 1, 2026 18:27 UTC
hn+sitemap
https://www.anthropic.com/sitemap.xml
Anthropic quietly published two new pages to its sitemap, including "Claude Fable and Mythos 5.1" and "Enterprise Frontier Safeguards," with the former quickly gaining traction on Hacker News.
✓ VERIFIED — BEAT THE ANNOUNCEMENT BY 0.0H · AUTO-VERIFIED AGAINST ANTHROPIC NEWS
READY TO POST:
anthropic seems to have quietly added pages for new claude models, fable 5.1 and mythos 5.1, to their sitemap. hn is already buzzing about it!
new anthropic sitemap entries spotted! looks like "claude fable and mythos 5.1" and an "enterprise frontier safeguards" page are live. what do we think fable and mythos could be?
EVIDENCE — the receipts
[MERGED across 3 sources: hn, sitemap]
shared signal: claude-fable-and-mythos-5-1
--- sitemap :: https://www.anthropic.com/sitemap.xml ---
Anthropic sitemap (https://www.anthropic.com/sitemap.xml): 2 new URLs, 0 removed
[new pages] (2)
+ https://www.anthropic.com/claude-fable-and-mythos-5-1
+ https://www.anthropic.com/news/enterprise-frontier-safeguards
--- hn :: https://news.ycombinator.com/item?id=49525496 ---
HN story climbing fast:
title: Claude Fable 5.1 and Claude Mythos 5.1
points: 67 in 0.4h = 152 pts/hr
link: https://www.anthropic.com/claude-fable-and-mythos-5-1
discussion: https://news.ycombinator.com/item?id=49525496
--- hn :: https://news.ycombinator.com/item?id=49525378 ---
HN story climbing fast:
title: Claude Fable 5.1 and Claude Mythos 5.1
points: 148 in 0.6h = 261 pts/hr
link: https://www.anthropic.com/claude-fable-and-mythos-5-1
discussion: https://news.ycombinator.com/item?id=49525378
caught by the 20-minute sweep ·
the live wire · all receipts