OpenAI will not pursue an initial public offering in 2026, Chief Executive Sam Altman told Fortune, citing the safety environment. The debate intensified after Anthropic CEO Dario Amodei proposed slowing frontier AI capability development through independent evaluations, common safety benchmarks and government coordination. Altman and Elon Musk supported the proposal, while Cathie Wood endorsed scrutiny of AI risks but dismissed warnings that the technology could kill humanity within a decade. More than 20 lawmakers called for tougher AI regulation after public warnings from Anthropic researchers, while AI-linked shares extended losses in Asian trading on Tuesday. President Donald Trump said existing authority was sufficient to regulate and prosecute AI companies without new legislation.