Elon Musk's High-Stakes $109 Billion Lawsuit Against OpenAI and Microsoft

In a major tech legal battle, Elon Musk is suing OpenAI and Microsoft. He alleges OpenAI strayed from its nonprofit roots for humanity's benefit, shifting to a for-profit model with huge profits. As a co-founder, Musk seeks $65.5 billion to $109.4 billion from OpenAI and $13.3 billion to $25.1 billion from Microsoft, totaling up to $134 billion. This highlights AI industry tensions on ethics, profit, and innovation.

Origins and Musk's Contributions

OpenAI started in 2015 as a nonprofit for safe, open AGI development, co-founded by Musk, Sam Altman, and others. Musk donated about $38 million (60% of seed capital), recruited talent, and boosted credibility. He claims OpenAI wouldn't exist without him but left the board in 2018 over direction disputes.

Core Allegations

Musk argues OpenAI breached a "Founding Agreement" by becoming for-profit in 2019 and partnering with Microsoft, which invested billions. This led to closed-source AI like GPT-4, favoring commerce over open benefits. Expert C. Paul Wazzan valued Musk's contributions, likening him to an early investor demanding profit disgorgement.

Defenses from OpenAI and Microsoft

OpenAI calls the suit "baseless" and a "harassment campaign" from Musk, now running rival xAI. They limit risk to Musk's $38 million donation and stress strong defenses. Microsoft denies aiding wrongdoing. Both challenge damages as "made up" and implausible.

Recent Developments

On March 13, 2026, lawyers argued in Oakland court over expert testimony. A judge set a jury trial for April 2026. Musk could win punitive damages or injunctions altering OpenAI's structure.

The case questions AI governance, balancing innovation with missions.