Anthropic introduced Fable 5 for general use with safeguards and Mythos 5 for a more limited group through Project Glasswing.
Why it mattered: the release illustrated that model capability, permissions, and deployment controls are separate design decisions.
What followed: Anthropic’s announcement records suspended access on June 12 and redeployment on July 1. Those changes are part of the history, alongside the original launch.