OpenAI’s chief executive and founder denies the allegations, which are similar to claims his sister has long made online.

The sister of OpenAI CEO Sam Altman has claimed he sexually abused her for nine years when she was a child. In a lawsuit filed in a Missouri federal court on Monday, Ann, or Annie, Altman alleges ...

OpenAI CEO Sam Altman reflected in a recent blog post about the past two years, and some of his comments may surprise.