Mythos-class model

Claude Fable 5: Anthropic's Most Capable Public Model Is Here — Benchmarks, Capabilities, and What It Means for Security

Anthropic just released Claude Fable 5, its most capable publicly available model and the first Mythos-class AI open to everyone. 80.3% on SWE-Bench Pro, 88% on Terminal-Bench 2.1, state-of-the-art across software engineering, vision, and scientific research. Safeguard has already integrated Fable 5 natively — here is everything you need to know.