Dario Amodei sat down with Bloomberg to discuss a topic that has become one of Silicon Valley’s defining breakup stories: why he left OpenAI, the organization he helped build, to launch a direct competitor.

The split that reshaped the AI industry

Amodei joined OpenAI in 2016, not long after the organization was founded. He eventually rose to VP of Research, placing him at the center of some of the most consequential decisions in early AI development.

By late 2020, he was done. His departure was officially announced on December 29, 2020, and he wasn’t alone. Roughly a dozen researchers, including his sister Daniela Amodei, walked out with him.

The core tension, as Amodei has framed it, came down to a gap between what OpenAI said it valued and what it actually did. He saw contradictions between the organization’s stated commitment to safety and alignment and the direction its leadership, particularly CEO Sam Altman, was steering the company.