Anthropic shutdown sparks EU sovereignty debate, Fable 5 blocked

The US government barred non-US citizens from accessing Anthropic's new Fable 5 and Mythos 5 models, forcing Anthropic to pull its most advanced models worldwide and triggering a debate in Europe over technological sovereignty.

The European Commission says it is assessing the practical impact of the US export control order that prompted the shutdown, while talks to restore access are ongoing and Anthropic CEO Dario Amodei is scheduled to join the heads of other leading AI companies at a working dinner with G7 leaders on Wednesday.

What happened and the Commission's view

The shutdown followed a US government order tied to national security concerns, which led Anthropic to block Fable 5 and Mythos 5 for non-US citizens and then pull its most advanced models worldwide. The European Commission said it is "assessing the practical impact of the US export control order" and warned that emergency measures must "not be discriminatory against partners." Thomas Regnier, the Commission's spokesperson for technological sovereignty, called the development "a shared challenge, not one confined to a single jurisdiction or company," and described it as "a further illustration of why Europe needs to strengthen its technological sovereignty."

Talks to restore access are ongoing, and the immediate diplomatic and industry-level discussions include AI company leadership and G7 officials, with Anthropic's CEO participating in a working dinner with G7 leaders.

Researchers' fault lines in Europe

European researchers published a collection of statements that largely agreed on alarm over the shutdown, but sharply disagreed on policy responses.

Thorsten Holz of the Max Planck Institute for Security and Privacy said it was striking that a single foreign government order could "shut down a model overnight for all non-US citizens," including European companies. He argued that digital sovereignty "doesn't mean self-sufficiency. It means being able to use critical technology even during geopolitical conflicts."

Konrad Rieck of TU Berlin warned US models can be "shut off at any time, sometimes for opaque reasons," and argued that Europe needs to "develop and operate its own capable models." LMU Munich's Gitta Kutyniok framed the response as an "Airbus moment" for AI, calling for joint, ambitious investment in foundation models, chip design, and energy-efficient computing.

By contrast, Paul Röttger of the Oxford Internet Institute said he does not believe more investment in European AI is the answer: "Europe won't be able to develop models like Mythos or Fable 5 in competition with the US." Röttger recommended securing access through contracts, tying deals to data center investments, and backing those arrangements with credible trade policy threats.

Two other researchers highlighted practical barriers. Matthias Hein of the University of Tübingen said Europe would need not just one but several providers of its own, because "nobody should count on commercial companies to keep releasing open-weight models." Jonas Geiping of the ELLIS Institute Tübingen noted structural constraints: French company Mistral has "fallen far behind," and even new players would face missing basics such as large-scale data centers and sufficient power supply. Geiping added that power generation in Germany "has dropped back to 1985 levels."

Geiping also warned against equating AI shutdowns with nuclear tensions, arguing that unlike nuclear weapons, "AI is deeply woven into the economy," so a shutdown during a diplomatic conflict could "deal serious damage to the European economy if processes can't function without strong AI."

Why it matters

The episode exposes a concrete point of fragility: access to advanced AI can be controlled by a single foreign policy decision, affecting companies and governments outside the United States. That reality forces a policy choice: pursue costly, large-scale domestic capabilities and infrastructure, or buy guaranteed access through contracts and trade leverage. The differing views among leading European researchers show there is no consensus on which path is viable or sufficient.

What to watch

Watch whether the European Commission moves from assessment to concrete measures that are explicitly non-discriminatory, and whether talks to restore access to Fable 5 and Mythos 5 yield firm commercial or diplomatic guarantees. Also track any new commitments for data-center investments or cross-border procurement that follow the working dinner with G7 leaders.