EU Pushes for Access to Anthropic’s Mythos

The EU is pressing for deeper talks with the US administration over advanced AI models. At the heart of the conversation is Anthropic’s Mythos.

There are growing concerns among governments over the security implications of Mythos, which Anthropic released to private companies in April. Its release triggered an immediate wave of concern when it surfaced that the model could identify tens of thousands of software vulnerabilities at a scale no previous system had demonstrated.

Anthropic introduced its Mythos model on 7 April, under the auspices of Project Glasswing, to a limited number of technology companies including Amazon Web Services, Apple, Nvidia, and Google. Anthropic expects to bring Mythos-class models to all customers in the coming weeks. This week, Anthropic expanded the reach of Mythos to an additional 150 companies across 15 countries but stated each will need to meet its security requirements before they gain access.

The EU made limited progress in securing access to details of vulnerabilities Anthropic’s Mythos AI model could reveal. European Commission spokesperson Thomas Regnier said that the EC has had several meetings with Anthropic to understand the capability of the model, its implications for the cybersecurity of the EU and Anthropic’s plan around Project Glasswing. “We will keep discussing with the company the cyber capabilities and risks of its latest model,” he stated.

Since August 2025, the EC’s AI Office has held regular technical meetings with Anthropic tied to the General-Purpose AI Code of Practice, to which the company is a signatory. “Cybersecurity is a shared priority, and we have agreed to mutually recognise our respective standards in this area,” Regnier stated. “On the EU side, we are also stepping up our cyber defences through targeted investments in AI and supercomputing.”