BREAKING
Claude Fable 5 Leaks Raw Reasoning
Reasoning Spilled, Not Answers
Inside the Leaked Trace
1DATA DATA. GO.
↓
2GRRR / GAAAH
↓
3I'M DROWNING 💀
↓
4PHEW
Fable 5 vs Mythos 5
Fable 5Public
●claude.ai and API
●Classifiers on
●Falls back to Opus 4.8
Mythos 5Partners
●Trusted partners only
●Same base model
●Relaxed guardrails
0+
prompt chars leaked
0
launched June 9
Thinking Drifts From Human-Readable
AI NEWS BLITZ
Anthropic's Claude Fable 5 reportedly spilled its raw chain-of-thought in the web interface.