Our impressions of Claude Fable/Mythos (we filmed this before the ban)

RIP Fable 5. We recorded this before it got taken offline, but it's still worth talking about. The model is incredible. We really miss it.

Thank you, Firecrawl, Depot, and Clerk for sponsoring!

• Firecrawl, the best api for searching and crawling the web: nerdsnipe.link/firecrawl
• Depot, better CI in every way: nerdsnipe.link/depot
• Clerk, the best dx in auth: nerdsnipe.link/clerk

Sources

• https://x.com/thsottiaux/status/2043177597434306699
• https://cognition.ai/blog/frontier-code
• https://x.com/paradite_/status/2064585901351792887
• https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c342ee809620.pdf (page 13 has the “prompt modification” quote)
• https://www.anthropic.com/institute/recursive-self-improvement

Timestamps

• 0:00 Intro
• 3:29 Fable First Impressions
• 10:24 Benchmark Drama
• 26:42 Claude Code & Workflows
• 36:07 Pricing & June 22 Cutoff
• 39:54 Data Retention
• 45:58 Hidden Safeguards
• 1:07:01 The Claude Constitution