This Tuesday morning, Anthropic officially launches Claude Fable 5, its most powerful public AI model to date. Both Anthropic's own announcement and reports from 9to5Mac confirm this "Mythos-class" model is now available to customers.

Claude Fable 5 is designed for general use, excelling in software engineering, knowledge work, vision, and scientific research. It scored 80.3% on the SWE-Bench Pro software engineering benchmark and was the first AI model to cross the 90% threshold on Hex's analy