The OpenAI president's testimony revealed Elon Musk confrontations with the company's founders and the OpenAI's skyrocketing computing costs.

Zilis, who is also a longtime adviser to Musk, took the witness stand on the sixth day of his lawsuit against fellow OpenAI co-founders Sam Altman and Greg Brockman. Musk alleges the executives abandoned OpenAI’s original nonprofit mission in pursuit of profit and personal gain.

OAKLAND, Calif. — OpenAI’s president Greg Brockman got grilled by Elon Musk’s lawyer on Monday over embarrassing diary entries from nearly a decade ago in which he fantasized about becoming a billionaire — even as the then-nonprofit charity got millions in donations from Musk.

In 2023, Brockman began acquiring shares in Helion Energy, worth $433,584.34 as of the end of last year. Altman has invested in the company since 2015, and was on the board until this year. In March 2024, OpenAI signed a non-binding agreement with Helion to use its as-yet undeveloped fusion reactors to power OpenAI's data centers.

Elon Musk’s attorney revealed private journal entries from 2017 in an attempt to make OpenAI co-founder Greg Brockman look like a money-hungry founder.

Greg Brockman never wanted to discuss his personal journal in public. But the OpenAI president has been stuck for days doing exactly that, while testifying in a trial in which Elon Musk has alleged that OpenAI abandoned its nonprofit mission to instead focus on personally enriching leaders like Brockman and Sam Altman.

Greg Brockman told a court he feared Elon Musk might attack him during a tense 2017 clash over OpenAI's direction.

OpenAI President Greg Brockman told the jury about an explosive meeting with Musk days after celebratory drinks at the Tesla CEO's 'haunted mansion.'