Closing Arguments Begin in Musk Versus OpenAI Trial

What Happened

Lawyers for Elon Musk and OpenAI began closing arguments Thursday in a trial that will determine whether OpenAI violated its original nonprofit obligations when it restructured toward a for-profit model. The case, heard in a United States federal court, centers on Musk's claim that OpenAI abandoned the charitable mission under which it was founded and to which he contributed early funding.

Background

OpenAI was established in 2015 as a nonprofit research laboratory with a stated mission to develop artificial intelligence for the benefit of humanity. Musk was among its co-founders and early financial backers before departing the board in 2018. The organization subsequently created a capped-profit subsidiary to attract outside investment, a structure that has allowed it to raise billions of dollars from investors including Microsoft.

Musk filed suit against OpenAI and its chief executive Sam Altman in 2024, alleging breach of contract and fiduciary duty. He argued that the move toward a commercial structure represented a fundamental departure from the nonprofit charter under which donors and co-founders, including himself, had contributed resources. OpenAI has disputed that characterization, maintaining that its governance structure remains consistent with its founding mission and that the for-profit arm is a necessary mechanism to fund large-scale AI development.

The case has drawn attention across the technology and legal sectors because its outcome could affect how nonprofit organizations in the United States govern transitions to commercial structures, particularly in industries where capital requirements are large.

What the Trial Has Covered

During the proceedings, both sides presented evidence related to the original founding documents, internal communications, and the terms under which early contributors provided support. Musk's legal team argued that those documents established binding obligations on OpenAI to operate as a nonprofit and that the restructuring violated those obligations. OpenAI's lawyers argued that no such binding contract existed with Musk personally and that the organization retained the legal authority to adapt its structure.

The trial has also examined OpenAI's relationship with Microsoft, which has invested approximately thirteen billion dollars in the company. OpenAI's counsel has argued that without large-scale commercial investment, the organization could not compete in an industry requiring substantial computing infrastructure.

Scope of the Case

The legal dispute is one of several proceedings involving Musk and OpenAI. Musk separately founded his own AI company, xAI, which released the Grok large language model and has positioned itself as a competitor to OpenAI's ChatGPT platform. OpenAI has noted this competitive context in its filings, arguing that Musk's litigation is partly motivated by business rivalry rather than concern over nonprofit governance.

The case also arrives as OpenAI is pursuing a broader corporate restructuring that would convert its controlling nonprofit entity into a public benefit corporation. That proposed transition is under review by the attorneys general of California and Delaware. The outcome of the Musk trial could have bearing on how regulators and courts assess that restructuring.

What the Numbers Say

OpenAI has reported an annualized revenue run rate of approximately three billion dollars as of early 2025 and has been valued at around eighty billion dollars in recent private funding rounds. The company employs more than three thousand people and operates data center infrastructure across multiple continents. Musk's xAI raised six billion dollars in a funding round in 2024.

What Happens Next

Following the conclusion of closing arguments, the presiding judge is expected to deliberate before issuing a ruling, with the timeline for that decision not yet publicly confirmed.