Microsoft, a major investor in OpenAI since 2019, has poured billions into the firm and become its biggest shareholder after a restructuring last year [File] | Photo Credit: REUTERS A trial in the lawsuit brought by Elon Musk against OpenAI CEO Samuel Altman and other defendants, including tech giant Microsoft, is scheduled to begin April 27, according to a federal court order issued Tuesday. The legal showdown will center on Musk’s claim that OpenAI and Altman abandoned the startup’s original nonprofit, public-benefit mission and misled him while turning the lab into a highly lucrative, Microsoft-linked for-profit enterprise. Musk alleges that Altman “intentionally courted and deceived” him by proposing a nonprofit that would serve as a counterweight to Google’s DeepMind AI research unit and make AI technology open source for the benefit of humanity. The suit claims OpenAI’s leaders have since restructured the organisation, created for-profit affiliates, and struck multibillion-dollar deals in a way that violated that mission. The Tesla and SpaceX boss was an original co-founder of OpenAI and its biggest funder when it began in 2015, providing tens of millions of dollars in seed capital. He left three years later. OpenAI went on to release ChatGPT in 2022 and Musk eventually launched a rival, xAI. Microsoft, a major investor in OpenAI since 2019, has poured billions into the firm and become its biggest shareholder after a restructuring last year. The trial, to be held before a jury, will be presided over by US District Judge Yvonne Gonzalez Rogers in Oakland, California. Published – January 14, 2026 11:31 am IST Share this: Click to share on WhatsApp (Opens in new window) WhatsApp Click to share on Facebook (Opens in new window) Facebook Click to share on Threads (Opens in new window) Threads Click to share on X (Opens in new window) X Click to share on Telegram (Opens in new window) Telegram Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Pinterest (Opens in new window) Pinterest Click to email a link to a friend (Opens in new window) Email More Click to print (Opens in new window) Print Click to share on Reddit (Opens in new window) Reddit Click to share on Tumblr (Opens in new window) Tumblr Click to share on Pocket (Opens in new window) Pocket Click to share on Mastodon (Opens in new window) Mastodon Click to share on Nextdoor (Opens in new window) Nextdoor Click to share on Bluesky (Opens in new window) Bluesky Like this:Like Loading... Post navigation Watch: Trump says the U.S. is “bringing Venezuela back” Kerala School Kalolsavam 2026: Full coverage