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When the U.S. government ordered Anthropic to prevent any foreigners from using its latest AI model Fable at the end of last week, the AI company quickly turned the model off for all users to comply.

Fable is the public-facing version of Mythos, the AI model that Anthropic had limited to approved companies due to concerns over how good it was at finding vulnerabilities and hacking software. Fable, per Anthropic, is Mythos but with guardrails to prevent malicious use.

According to the Wall Street Journal, the government’s directive came after Amazon researchers claimed to have found ways to get around those Fable safeguards, getting it to help carry out a cyberattack. Anthropic noted in a post that other models, like GPT 5.5, could do the same.

After the directive, one hundred and fifty cybersecurity experts swiftly decried the government’s action, co-signing an open letter to Commerce Secretary Howard Lutnick and national cyber director Sean Cairncross. They argue this only benefits criminal hackers and America’s adversaries.

Among the critics is Jack Cable, former cyber researcher at the DHS Cybersecurity and Infrastructure Agency. Cable, now cofounder and CEO at $200 million-valued AI cyber startup Corridor, tells........

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