In a dramatic courtroom showdown, Sam Altman, CEO of OpenAI, defended himself against a lawsuit filed by Elon Musk, who alleges that Altman violated their founding agreement by transforming OpenAI into a for-profit company. Musk claims he was misled into co-founding OpenAI and is seeking Altman's removal along with the return of $134 billion to the company's non-profit arm. Altman countered that Musk's accusations are rooted in jealousy following his failed attempt to take over OpenAI in 2018 and his subsequent departure from the board. During his testimony, Altman described Musk as an erratic leader who had previously sought total control over the organization, making him uncomfortable. The trial, which has featured high-profile witnesses from Silicon Valley, is crucial for OpenAI as it aims for a public offering with a valuation of around $1 trillion later this year. The trial is set to conclude with closing arguments, after which a jury will determine the outcome.