Anthropic Just Released The Model
They Were Almost Too Scared To Ship.
Fable 5 is the public version of Mythos — state-of-the-art on nearly every benchmark, codes for 9 hours straight, plays Pokemon on its own. Pro tier only, double the tokens, gone June 23.
What's inside
- What Fable 5 actually is and how it differs from Opus 4.8
- How to access it across Pro, API and Claude Code
- Workflows worth burning the 2x tokens on
- What the safety routing actually does behind the scenes
Claude Fable 5 — The Public Version of Mythos
by Divjot Sahni · EZYE Consulting · ezye.com.au
What Fable 5 (Mythos) Actually Is
Anthropic's most capable public model — model ID claude-fable-5
The unrestricted version stays behind the Glasswing program for vetted cyberdefenders
Public Fable 5 = same underlying model with safety routing on top
State-of-the-art on nearly every benchmark Anthropic publishes
How To Access It Today
Available on Claude Pro and higher (not free tier)
Live in Claude Code, claude.ai and the API
Burns roughly double the output tokens of Opus 4.8
Public preview window closes June 23
Free access — enter your email below