Anthropic CEO Says Loss of Trust Drove His Exit From OpenAI

**Anthropic co-founder and CEO Dario Amodei used an interview on Bloomberg's program *The Circuit* to explain the backstory of an awkward on-stage moment with Sam Altman in February 2026 and why he left OpenAI to build a rival.** The episode was released as a roughly 47-minute documentary and also features his sister, Anthropic President Daniela Amodei. In it, Dario said the world would "see who wins in the market — and who wins in the court of public opinion," framing the rivalry with OpenAI in terms of both market share and reputation.