After a yearslong legal feud, Elon Musk and OpenAI CEO Sam Altman are heading to trial this week in Northern California in a case that could have sweeping consequences.

Jury selection begins Monday in the federal trial pitting Elon Musk against Sam Altman, OpenAI and Microsoft over whether OpenAI abandoned the nonprofit mission Musk says he helped fund.

Mr Musk is seeking $US150 billion ($208 billion) in damages from OpenAI and Microsoft, one of its largest investors, according to a person involved in the case, with proceeds going to OpenAI's charita...