Anthropic ships Claude Fable 5 and Claude Mythos 5 on the same day; Fable 5 is positioned as a Mythos-class model
AnthropicAnthropic's July 1, 2026 post says it is launching Claude Fable 5 and Claude Mythos 5, describing Fable 5 as 'a Mythos-class model that we've made safe for general use'.
Originally published Jul 1, 2026