Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2

Anthropic launches new Claude Fable and Mythos 5.2 models

Anthropic announced Claude Fable 5.2 and Claude Mythos 5.2, citing gains in coding, reasoning and vision and faster output than version 5.1. In pre-release tests, the company says, the two models helped complete software migrations, designed 3 working electronic devices from scratch, solved 2 open problems in black hole physics and formalized a proof of Fermat's Last Theorem within 30 hours.

Why it matters: Anthropic set different access scopes for the two models: Fable is live today, while Mythos is initially limited to vetted organizations.