Sam Altman, often considered the face of the new wave of artificial intelligence — and an influential figure in the national AI policy debate — was removed from his role as CEO of OpenAI Friday.

Altman’s departure comes after OpenAI’s board lost confidence in him, according to a blog post from the company.

“Mr. Altman’s departure follows a deliberative review process by the board, which concluded that he was not consistently candid in his communications with the board, hindering its ability to exercise its responsibilities,” according to the post. “The board no longer has confidence in his ability to continue leading OpenAI.”