More than 50 cybersecurity industry leaders have signed an open letter demanding the Trump administration reverse emergency export controls on two of Anthropic’s most advanced AI models. The group argues the restrictions handicap professionals stopping cyberattacks while doing little to deter attackers.
The letter arrived two days after the US Commerce Department issued an emergency order requiring Anthropic to block foreign nationals from accessing its Fable 5 and Mythos 5 models. The trigger was a reported jailbreak of cybersecurity safeguards.
Signatories include executives from Nvidia and Adobe, alongside prominent figures like Joshua Saxe and Alex Stamos. They claim the restricted models do not provide capabilities beyond open-source alternatives already available. Anthropic responded to the order by globally suspending access to both models, cutting off American cybersecurity teams entirely.
The export controls land amid growing friction between Anthropic and the US government. The company has previously taken stances against enabling mass surveillance or military use of its technology. The Department of Defense had also earlier designated the firm as a supply-chain risk.
Valued near $965 billion and reportedly preparing for an IPO, Anthropic faces heightened regulatory risk. Open-source AI models could see accelerated adoption if comparable capabilities exist freely. The outcome of this industry pressure may set a precedent for future regulation of advanced AI models.