Billionaire entrepreneur Elon Musk expanded his lawsuit against ChatGPT maker OpenAI, adding federal antitrust and other claims and adding OpenAI's largest financial backer Microsoft as a defendant.

People are leaving Twitter (sorry, “X”) and are flocking in their millions to Bluesky — but what is the new social media app?

Futures are mixed as Tesla stock soared on a report that team Trump wants federal self-driving rules. Nvidia earnings loom large.