The US government's sudden shutdown of Anthropic's AI models has sparked a global push for sovereign AI capabilities, with allies like the UK, France, and Canada now treating reliance on American AI as a national security risk.

What happened

At the White House's request, Anthropic took its Fable 5 and Mythos 5 models offline over the weekend, blocking access for all foreign nationals including its own employees. The Trump administration's action came with little warning or explanation, and was reportedly triggered in part by concerns that a group linked to China had accessed one of the models.

Why it matters

The incident has reinforced long-standing concerns among governments and businesses about depending on the US for critical technologies. In the UK, the AI minister framed the shutdown as evidence that Britain must develop its own AI capacity as a matter of national security. France's former Prime Minister called the shutdown the start of 'the AI war' and likened it to a strategic chokepoint. Canada's Prime Minister said the situation highlights the risk of overreliance on a single partner for access to crucial AI resources. The European Union has already been emphasizing tech sovereignty, and this event is now fueling urgent calls to accelerate those efforts.

What to watch

Anthropic may soon bring Mythos and Fable back online, but the article notes that restoring global trust in American AI models is another matter entirely. The shutdown has exposed how fragile access to US frontier AI models is, and many governments and companies are now committed to building alternative capacity—whether through sovereign models like France's Mistral or Canada's Cohere, or through narrower strategic priorities like improved local-language models or open-source alternatives.