WASHINGTON — Elon Musk's legal team concluded its arguments in the trial by alleging OpenAI deceived its founders and the public. Lawyers said the company shifted its mission from developing open-source AI for humanity's benefit to a for-profit model, violating a core contractual understanding.

The lawsuit centers on OpenAI's transition to a capped-profit entity in 2019, which enabled it to commercialize advanced AI models like GPT-4. This strategic pivot allowed for massive corporate investments, most notably Microsoft's nearly $13 billion stake. The deal grants Microsoft 49 percent of OpenAI's profits until its investment is recouped, giving the software giant significant control over OpenAI's technology and strategic direction.

Musk's attorneys presented evidence suggesting internal communications showed a deliberate move away from the original nonprofit charter. They argued this commercialization betrayed the initial vision shared among the founders: that AI development should serve public good, not private corporate gain. The trial has highlighted a deep ideological split over how artificial intelligence should be developed and controlled, pitting open-source advocates against the commercial interests of tech firms.

The legal challenge carries significant financial implications for both OpenAI and its primary backer, Microsoft. A ruling against OpenAI could force a restructuring of its corporate governance, potentially affecting its ability to license key technologies and its overall valuation. This outcome would also ripple through the broader AI sector, where companies like Alphabet and Amazon are investing heavily in proprietary models, hoping to replicate OpenAI's commercial success.

The court's decision will set a precedent for future AI governance and intellectual property rights, particularly concerning the obligations of companies that originate from nonprofit foundations. It will define the boundaries of corporate responsibility and determine who benefits from the rapid advancement of artificial intelligence. The stakes are high for all players in the AI race, a market that has driven Nvidia's stock to $234.71 today, up 3.9 percent.