OpenAI will not pursue an initial public offering (IPO) in 2026, CEO Sam Altman said in a Fortune interview released Saturday, citing the amount of safety work the company still needs to complete. His comments came as concerns about doomsday AI scenarios intensified after an Anthropic employee resigned and issued a dire warning about AI’s capabilities. Markets had expected major IPOs from both OpenAI and Anthropic this year. The decision increases pressure on Anthropic CEO Dario Amodei, who warned Saturday that AI development needs to slow. The story was identified as breaking news and set for updates.