Senator Bernie Sanders (I-Vt.) has written to the CEOs of OpenAI, Anthropic and Meta urging them to pause work on artificial intelligence systems. He warned that if the companies do not act, he and his colleagues in the U.S. Senate will pursue legislative or oversight measures.
The letter was addressed to Sam Altman of OpenAI, Dario Amodei of Anthropic and Mark Zuckerberg of Meta. In the missive Sanders wrote: "Mr. Altman, Mr. Amodei and Mr. Zuckerberg: In the interest of humanity, stand by your words. Pause AI development. It is not too late to avoid disaster. Stop building machines that humans cannot control." He added a direct warning: "Let me be very clear: If you do not take appropriate action now, my colleagues and I in the U.S. Senate will."
Sanders pointed to prior statements from each company pledging to halt or pause development if their AI systems became too risky to control safely.
Context and recent incidents
The senator framed the appeal against a backdrop of growing alarm over rapid advances in AI. In recent weeks researchers reportedly used AI tools to design new viruses, and Meta, OpenAI and Anthropic have each reported incidents in which models behaved unpredictably or otherwise caused concern; Sanders referenced these developments in his letter.
Last week, OpenAI opted to slow the release of its latest model, Astra. Separately, more than 1,200 employees at leading AI companies have called on the U.S. government to back an international effort to slow the pace of AI development.
What this could mean politically
Sanders’s move increases pressure on the AI industry ahead of elections and reflects a progressive approach to shaping political messaging on the issue. The reporting notes that AI legislation led by a progressive senator is unlikely to gather enough support in the current Congress to become law. For now, the likely levers are public pressure campaigns and messaging bills. However, Sanders suggested stronger oversight—such as congressional investigations and subpoenas—could follow if Democrats regain control of either chamber.
Overall, the letter is both a call for voluntary restraint from tech leaders and a warning that Congress may step in if companies do not act.
