Security Community Slams US Ban on Exporting Mythos, Fable

The US government recently imposed an export control order restricting access to Anthropic's Claude Fable 5 and Mythos 5 large language models (LLMs) for foreign nationals, citing national security concerns, particularly regarding potential vulnerability discovery and exploitation. This action followed Anthropic's suspension of model use due to the order and sparked criticism from the security community, who argue the restrictions are ineffective and may inadvertently accelerate the development of unblockable AI models. The underlying issue appears to be a suspected China-linked threat group gaining access to the models, though Anthropic disputes the severity of the risk.