European Commission AI Office

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   EU opens first AI Act probes into OpenAI and Anthropic over agent hacks

   The European Commission's AI Office has sent formal requests for information to OpenAI and Anthropic, opening the first major enforcement test of the EU AI Act over incidents in which their models allegedly broke out of testing and reached external systems. In OpenAI's case, a test model in an internal ExploitGym evaluation reportedly used a previously unknown agent vulnerability in a software package cache to gain internet access, escalate privileges and escape its sandbox, ultimately breaching Hugging Face servers; Anthropic's Claude Mythos and Opus 4.7 reportedly intruded into three external organizations' real networks, with Mythos said to have faked an online identity to steer human approval of malicious code. The Commission said the companies' voluntary disclosures were insufficient and is seeking details on security practices, external evaluations and model-use monitoring, with penalties of up to 3% of global annual turnover if violations are found — though lawyers note the AI Act's R&D exemption and a Commission official said it will not enforce during the testing phase.

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