CATCH #944
DETECTED AUG 24, 2026 21:15 UTC
THE CATCHscore 9/10
EXHIBIT 944 · FLASH
Aug 24, 2026 21:15 UTC
sitemap
https://platform.claude.com/sitemap.xml
Anthropic's sitemap shows new docs for Claude "Fable 5" and "Mythos 5" models, plus numerous Opus and Sonnet 4.5/5/6/7/8 variations, hinting at a major model release or update, as well as a new 'browser-use-tool' capability.
READY TO POST:
anthropic quietly added a bunch of new claude model names to their sitemap, including fable 5, mythos 5, and new opus and sonnet 4.x/5.x versions. seems like big updates are coming!
looks like claude might be getting a 'browser-use-tool' capability based on new sitemap entries. also, a ton of unannounced model versions like fable 5 and mythos 5 appeared.
EVIDENCE — the receipts
Anthropic docs sitemap (https://platform.claude.com/sitemap.xml): 44 new URLs, 60 removed
[new pages] (44)
+ https://platform.claude.com/docs/de/agents-and-tools/tool-use/browser-use-tool
+ https://platform.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5
+ https://platform.claude.com/docs/en/models/fable-5/overview
+ https://platform.claude.com/docs/en/models/haiku-4-5/overview
+ https://platform.claude.com/docs/en/models/mythos-5/overview
+ https://platform.claude.com/docs/en/models/opus-4-5/overview
+ https://platform.claude.com/docs/en/models/opus-4-6/overview
+ https://platform.claude.com/docs/en/models/opus-4-7/overview
+ https://platform.claude.com/docs/en/models/opus-4-8/overview
+ https://platform.claude.com/docs/en/models/opus-5/overview
+ https://platform.claude.com/docs/en/models/opus-5/whats-new-opus-5
+ https://platform.claude.com/docs/en/models/overview
+ https://platform.claude.com/docs/en/models/sonnet-4-5/overview
+ https://platform.claude.com/docs/en/models/sonnet-4-6/overview
+ https://platform.claude.com/docs/en/models/sonnet-5/overview
+ https://platform.claude.com/docs/en/models/sonnet-5/whats-new-sonnet-5
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-fable-5
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3-5
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-4-5
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-3
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-1
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-5
+ https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-6
+ https://platform.claude
caught by the 20-minute sweep ·
the live wire · all receipts