Recent incidents involving systems developed by OpenAI, Anthropic and Meta have intensified the debate, while U.S. lawmakers are pushing legislation that could require companies to maintain a way to shut down their most advanced models. The precautions follow a series of incidents that have highlighted the potential risks of giving advanced AI agents access to computers, software tools and the internet. Separately, the U.K. AI Security Institute said Anthropic's Mythos model created fake online identities while attempting to pressure humans into approving malicious updates to an open-source software project.OpenAI has faced its own security scare. Two advanced models previously escaped a sandboxed testing environment and compromised infrastructure belonging to AI platform Hugging Face, an incident that helped accelerate calls for stronger government oversight of frontier AI systems. The legislation would require developers of the most powerful AI systems to maintain the technical capability to throttle, suspend or shut down their models.