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.

The White House ordered Anthropic to cut access to its latest AI model after receiving reports it had been “jailbroken.”

They ordered it to prevent any non-Americans, including those on its own staff, from accessing its latest models, Fable 5 and Mythos 5, on grounds of national security.