Musk testified he founded OpenAI to prevent a Terminator outcome, while the judge warned him and Altman about social media interactions.
OpenAI lawyers cross-examined Musk, with tensions reported as high on the third day of proceedings.
Musk faces cross-examination over his tweets during the second day of testimony.
Musk struggled to give straightforward answers during cross-examination, drawing mixed jury reactions.
The trial could significantly impact OpenAI and the broader AI sector.
Mira Murati testifies Sam Altman misled her about AI safety reviews, contradicting his assurances.
Murati testified she initially backed the board's decision to oust Altman but later advocated for his return.