# Fable 5

The Glasswing Gambit: Anthropic’s Strategic Bifurcation of Artificial Intelligence

Anthropic has launched a tiered model strategy featuring Fable 5, a high-performance model with restricted cyber and bio-risk capabilities, and Mythos 5, an unrestricted version available only to vetted users via 'Project Glasswing.' This move signals a shift toward treating frontier AI as regulated, dual-use technology.