Breaking: US Government Bans Foreign Access to Anthropic’s Fable 5 and Mythos 5

Axios reported that the US Trump administration invoked national‑security authority to impose export controls on Anthropic’s newest AI models, Fable 5 and Mythos 5, banning access by foreign governments, enterprises, and individuals.

Commerce Secretary Howard Lutnick sent a letter to Anthropic CEO Dario Amodei stating that the two models are subject to export restrictions covering any location outside the United States and all foreigners inside the US.

This places the models in the same export‑control framework as high‑end chips and sensitive software, rather than a simple ban on overseas subscriptions.

A government official explained that the move was triggered after another company claimed to have successfully jailbreaked Mythos, raising national‑security concerns.

Earlier, the Commerce Department had tried to persuade Anthropic to pause the release, but the effort failed, leading to the formal export‑control letter.

Reuters noted that earlier this month President Trump signed an executive order requiring leading AI developers to voluntarily submit their most powerful models for government cybersecurity testing before public release.

The official added that the models will remain blocked until the US national‑security system is reinforced, a process expected to take several weeks.

Consequently, Anthropic must obtain licenses for any export, re‑export, or transfer to foreign entities within the US and submit additional applications for item‑by‑item verification; non‑compliance could result in civil and monetary penalties.

Anthropic has issued a statement on the restrictions, and given its recent inclusion on the Pentagon’s blacklist for being deemed too dangerous for US government use, the company now finds itself in a delicate position—restricted both for domestic and foreign use.