What is Fable?

Fable is a frontier AI model referenced in discussions about capability, cost, and performance. Its perception as a capability milestone has evolved, with debates about its cost-effectiveness and qualitative performance.

• Jun 2026 – Cameron said Fable was a big regression, noting that more power doesn’t always mean better when dealing with subjective nuance.
• Jun 2026 – Nathaniel Whittemore described a “smartest compound model in the market achieving fable level intelligence at half the price,” and said most observers had their timelines for when “we get Fable back” extended, not shortened.
• Jul 2026 – Guillermo Rauch said Kimmy K3 is the best performing model ahead of Fable, reaching a comparable success rate in less time.