The European Commission is examining the practical consequences for users across the bloc after Anthropic disabled Fable 5 and Mythos 5, saying it had received a US export-control directive barring access by any foreign national, including non-US staff inside the company. The measure, issued on national security grounds, has raised concern that frontier AI services can be withdrawn from allied markets with little warning when Washington classifies them as sensitive technology.
A Commission spokesman said emergency measures should not be discriminatory against partners, a pointed response that stops short of a formal challenge but signals discomfort in Brussels over the breadth of the order. The case lands at a delicate moment for transatlantic technology policy, with Europe trying to tighten AI governance while accelerating domestic computing capacity to reduce reliance on foreign providers.
Anthropic said the directive arrived on June 12 at 5.21pm Eastern Time and did not give detailed reasons for the national security concern. The company said US officials believed they had become aware of a method to bypass safeguards in Fable 5, but argued that the demonstrated technique identified only a small number of known, minor vulnerabilities. It said similar vulnerabilities could be found using other publicly available models without such a bypass.
The order affected two models launched only days earlier. Fable 5 was presented as a broadly available frontier model with strong safeguards, while Mythos 5 used the same underlying model with some safeguards lifted for vetted cybersecurity and research partners. Anthropic said Fable 5 could operate autonomously for longer than previous Claude models, improve productivity in large software projects and handle complex vision, document and analytical tasks.
The suspension has widened a debate over whether advanced AI models should be treated like chips, cryptography or other dual-use technologies subject to export licensing. US policy has already restricted advanced semiconductors and cloud computing access for sensitive jurisdictions, but the Anthropic order pushes the boundary closer to the model layer itself. For enterprise customers, that shift changes risk calculations around procurement, continuity planning and the legal exposure of AI systems embedded in banking, health care, government services and cybersecurity operations.
European officials are weighing the issue against the bloc’s own AI rulebook. The AI Act, which entered into force in 2024, gives the EU a risk-based framework for governing AI systems and general-purpose models, with the European AI Office playing a central supervisory role. Yet the Anthropic case shows that regulation alone cannot guarantee access when the underlying technology is controlled by a company subject to another government’s security directives.
The timing is awkward for Anthropic’s international expansion. The company has been courting regulated industries and had announced partnerships intended to bring Claude systems into large organisations across multiple countries. A directive applying to foreign nationals as a category, rather than to specific hostile actors or sanctioned entities, creates operational complications for multinational clients and vendors with global engineering teams.
Washington’s case rests on the argument that frontier models with advanced cyber capabilities could be misused by foreign military or intelligence services. That concern is not dismissed in Europe, where governments face persistent cyber espionage, disinformation and infrastructure threats. The tension lies in the scope of the remedy. Blocking all foreign nationals, including allies, may protect one risk channel while undermining confidence in US technology platforms as dependable infrastructure.
The episode is likely to strengthen Europe’s sovereign AI agenda. The Commission has already set out plans to mobilise €200 billion for AI development, including €20 billion for up to five AI gigafactories, alongside a network of AI factories intended to support start-ups, industry and research. Those programmes were designed to close Europe’s compute and deployment gap; the Anthropic cutoff adds a strategic-access argument to the economic case.
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