Amazon cybersecurity research triggered White House export ban on Anthropic's Fable 5 and Mythos 5
Amazon cybersecurity findings and CEO Andy Jassy conversations with the White House led to the export control directive that forced Anthropic to cut off Fable 5 and Mythos 5 access.
Amazon security research and direct conversations between CEO Andy Jassy and the White House triggered an export control directive that forced Anthropic to cut off access to Fable 5 and Mythos 5, according to the Wall Street Journal. The Amazon paper reportedly identified specific exploit pathways in advanced language models that could be weaponized by state actors. Jassy's conversations with White House officials framed the findings as urgent enough to warrant immediate export restrictions. Anthropic announced the cutoff on June 11, giving international users 72 hours to migrate workloads; the models remain available to U.S.-based customers and approved government contractors.
The move marks one of the most aggressive uses of export control authority in the AI sector, applying restrictions typically reserved for dual-use technologies like advanced semiconductors to a commercial language model. Fable 5 and Mythos 5 were released in May 2026.
