Early access review: Claude 5 Fable (Mythos-class AI) shows major performance leap
By
Ethan Mollick
Pure flour-power. Hearty enough to carry you through lunch.
Summary
The article describes the author's early access experience with Mythos-class AI model Claude 5 Fable. While much discussion has focused on its impact on software security, the author tested it on everything except security (as guardrails prevent cybersecurity use). The author concludes Fable represents a significant leap over previous models and suggests our relationship with AI is changing drastically, as it outperformed basically every other model in their experiments.
Key quotes
· 4 pulledMuch of the discussion of Mythos has centered on its impact on software security, but I tested it on everything except that
It represents a very real leap over every model I have used before
Our relationship with AI is changing in drastic ways
In experiment after experiment I conducted, it outperformed basically every
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