US government imposes export controls on Anthropic's Fable 5, model now offline

Who decides when AI is too dangerous?

The US government imposed export controls on Anthropic's newly released Fable 5 model, restricting access by foreign nationals. Anthropic responded by taking both Fable 5 and the underlying Mythos 5 model offline entirely. The trigger: Amazon researchers found a potential jailbreak, and Amazon's CEO escalated concerns directly to the Trump administration. The irony is thick—Anthropic spent years urging the government to regulate dangerous AI, and now it's unhappy with how that regulation is playing out. As of recording, Fable 5 remains unavailable; the post doesn't specify when it might return.

Why it matters: Anthropic's first public Mythos-tier model, Fable 5, was pulled entirely days after launch due to US export controls triggered by an Amazon researcher's jailbreak discovery. Hits all three HKR axes: Anthropic product action, concrete safety incident, and policy shock. Not 95+ ...