OpenAI president Greg Brockman's journal has emerged as a star witness in the Musk v. Altman trial; Brockman says he stopped writing about OpenAI in it in 2023 (Ben Cohen/Wall Street Journal)

Greg Brockman's journal has become a significant piece of evidence in the ongoing legal battle between Elon Musk and Sam Altman. Brockman revealed that he ceased documenting details about OpenAI in his journal starting in 2023, adding a layer of intrigue to the trial. This development highlights the intersection of personal records and corporate disputes in the tech industry.