Who decides when AI is too dangerous?

The US government imposed export controls on Anthropic's Fable 5 AI model and its underlying Mythos model, restricting access even for foreign nationals working at Anthropic in the US. Anthropic then took both models offline because the company said it couldn't reasonably comply with the restrictions while keeping the models publicly available. This incident raises broader questions about how the US government should regulate AI and whether its approach will be a genuine safety framework or a political tool.