# Elon Musk is suing OpenAI, claiming that the AI firm has abandoned its mission to remain a nonprofit.

*genai · news · 2026-04-27 · Ars Technica*

## Key points

- A trial starting this week could force OpenAI to abandon its for-profit arm if Musk wins.
- Internal documents, especially Greg Brockman's 2017 diary, may be decisive evidence in the lawsuit.
- Emails show both Musk and Altman's motives for OpenAI's leadership were distrusted by co-founders in 2017.
- If Musk wins, Altman and Brockman could be ousted from OpenAI leadership and board positions.
- OpenAI's rival Anthropic, not Musk's xAI, is now considered its main competitor in the AI industry.

**Companies:** OpenAI, Microsoft, xAI, Anthropic
**Countries:** United States

[Read the full story on Ars Technica](https://arstechnica.com/tech-policy/2026/04/musk-and-altman-face-off-in-trial-that-will-determine-openais-future/)

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