Claude Mythos 5
9 June 2026
Claude Mythos 5 from Anthropic, language,multimodal model published 2026-06-09. Notable for: sota improvement.
Abstract
Today we’re launching Claude Fable 5: a Mythos-class1 model that we’ve made safe for general use. [...] For a small group of cyberdefenders and infrastructure providers, we’re also launching Claude Mythos 5. It’s the same underlying model as Fable 5, but with the safeguards lifted in some areas.2 Mythos 5 will initially be deployed through Project Glasswing, in collaboration with the US government, as an upgrade to Claude Mythos Preview. It has the strongest cybersecurity capabilities of any model in the world. Soon, we intend to expand access to Mythos 5 through a broader trusted access program.
Sources: Epoch AI. This entry was generated from a dataset and has not been edited by hand.