In his second day on the stand in the trial he launched against OpenAI, Elon Musk said the AI start-up he'd helped found had strayed from its charitable mission.

The judge also warned Musk and Sam Altman to curb their “propensity to use social media to make things worse outside the courtroom” after both sides traded attacks online.

The Elon Musk-Sam Altman courtroom showdown already promised plenty of fireworks. And in its first week, dominated by the world's richest man taking the stand in a federal courthouse in Oakland, Calif.

Elon Musk’s aerospace company, SpaceX, recently announced that it has secured the option to buy the AI code-generation startup, Cursor, or pay for their partnership. SpaceX and Musk’s AI startup xAI merged in February this year.

Elon Musk, who split from OpenAI years after cofounding it as a nonprofit in 2015, said it was putting commercial interests over the public’s. A company lawyer said Mr. Musk had sued because he did not get his way.

Elon Musk's SpaceX Teams Up With Cursor for AI Coding: How Rockets and AI Fit Together

AI startup Cursor eyes a $60B acquisition by SpaceX. Co-founded by Pakistan’s Sualeh Asif, it highlights rapid growth in AI coding tools.

Learning to code was once a fast-track ticket to success. It’s the self-taught skill that launched the careers of Bill Gates, Mark Zuckerberg, and Elon Musk. Even former President Barack Obama urged young people to learn to code. But according to one ...

The 4-year-old startup just propelled SpaceX in the AI coding race.