Anthropic's most powerful public AI model was taken offline just days after launch. Before the ban, I tested Fable 5 against leading models to see what made it so controversial.

Anthropic has restricted access to its powerful Mythos 5 and Fable 5 AI models for foreign nationals following a directive from the Trump administration.

The Commerce Department’s Anthropic directive, issued last week, represents the most significant intervention by the US government to date into an AI venture’s operations.