Rachel Miro

Musk told the court he sued OpenAI after deciding his co-founders put profit ahead of their founding mission.

But under cross-examination, defense attorneys highlighted texts and emails

that showed his own AI company, XI, partially lifted code from OpenAI's models, and Musk and Mark Zuckerberg of Meta discussed bidding together on OpenAI's intellectual property.

On Monday, OpenAI co-founder Greg Brockman is expected to take the stand.

For NPR News, I'm Rachel Miro in Oakland.

Musk told the court he sued OpenAI after deciding his co-founders put profit ahead of their founding mission.

But under cross-examination, defense attorneys highlighted texts and emails that showed his own AI company, XI, partially lifted code from OpenAI's models, and Musk and Mark Zuckerberg of Meta discussed bidding together on OpenAI's intellectual property.

On Monday, OpenAI co-founder Greg Brockman is expected to take the stand.

For NPR News, I'm Rachel Miro in Oakland.

Musk told the court he sued OpenAI after deciding his co-founders put profit ahead of their founding mission.

But under cross-examination, defense attorneys highlighted texts and e-mails

that showed his own AI company, XI, partially lifted code from OpenAI's models, and Musk and Mark Zuckerberg of Meta discussed bidding together on OpenAI's intellectual property.

On Monday, OpenAI co-founder Greg Brockman is expected to take the stand.

For NPR News, I'm Rachel Miro in Oakland.

Elon Musk still has more cross-examination to get through, first from OpenAI, then Microsoft, before his own lawyer gets a final word trying to re-narrate what's happened before.

OpenAI's lead lawyer has already spent hours using Musk's own emails and texts to argue he pushed for majority control of OpenAI.

poached top employees for Tesla and pulled his funding when he didn't get his way.

Musk countered he never sought absolute control and waited to sue because it took years for him to conclude OpenAI had truly walked away from its non-profit roots.

OpenAI's co-founder Greg Brockman is expected to take the stand for the first time today.

For NPR News, I'm Rachel Miro in Oakland.