Live updates from Elon Musk and Sam Altman’s court battle over the future of OpenAI

The Verge / 4/29/2026

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Key Points

  • Sam Altman(OpenAI)とイーロン・マスクの間で、OpenAIの将来(特にChatGPTを含む方針)を左右し得る裁判が進行している。
  • マスクは、OpenAIが創業時の「人類のためのAI開発」ミッションを捨て、利益優先に転じたとして提訴し、アルトマンらが資金提供を取り付けた経緯に不正があったと主張している。
  • OpenAI側は、この訴訟は根拠のない競合妨害であり、マスクの自社(SpaceX/xAI/X)がChatGPTに対抗する製品(Grokなど)を展開するための動機だと反論している。
  • マスクは、アルトマンとグレッグ・ブロックマンの排除、さらにOpenAIが公的利益法人(public benefit corporation)として運営することの停止を求め、勝訴した場合の損害賠償として最大1500億ドル規模を要求している。
  • 裁判は4月27日の陪審員選定から始まり、マスク自身が証言する形で審理が進んでいる。
Graphic photo collage of Sam Altman and Elon Musk.

Sam Altman and Elon Musk are facing off in a high-stakes trial that could alter the future of OpenAI and its most well-known product, ChatGPT. In 2024, Musk filed a lawsuit accusing OpenAI of abandoning its founding mission of developing AI to benefit humanity and shifting focus to boosting profits instead.

The trial began with jury selection on April 27th, before Elon Musk took the stand on Tuesday as the first witness called, portraying his interest in founding OpenAI as an effort to help save humanity.

Musk was a cofounder of OpenAI and claims that Altman and cofounder Greg Brockman tricked him into giving the company money, only to turn their backs on their original goal. However, OpenAI says that “This lawsuit has always been a baseless and jealous bid to derail a competitor” in a bid to boost Musk’s own SpaceX / xAI / X companies that have launched Grok as a competitor to ChatGPT.

In his lawsuit, Musk is asking for the removal of Altman and Brockman, and for OpenAI to stop operating as a public benefit corporation. Musk has also demanded that OpenAI’s nonprofit receive up to $150 billion in damages he’s asking for if he wins the case.

Stylixe podcast title image showing Elon Musk and Sam Altman.

Here’s all the latest on the trial between Musk and Altman: