Lawyers for Elon Musk and OpenAI made their final arguments Thursday in the landmark trial whose outcome could shape the future of artificial intelligence.

Elon Musk took the stand for the second day Wednesday in the landmark trial that pits the world’s richest person against Sam Altman, a fellow OpenAI co-founder he accuses of betraying promises to keep the company as a nonprofit dedicated to humanity’s benefit.

Elon Musk, the Tesla CEO, world’s richest man and OpenAI’s cofounder, took the stand Tuesday in a high-stakes trial revolving around a bitter feud between himself and former friends Sam Altman and Greg Brockman that could reshape the future development of artificial intelligence.

The attorney who negotiated the $2.8 billion legal settlement for the NCAA says thousands of former athletes due to receive damages could have to wait months or maybe more than a year to get paid while appeals play out.