A U.S. judge lets Musk’s 2024 lawsuit against OpenAI and Microsoft go to trial in April 2026 over claims they broke their nonprofit AI mission.

A U.S. federal judge has allowed Elon Musk’s 2024 lawsuit against OpenAI and Microsoft to proceed to trial in late April 2026, rejecting efforts to dismiss claims that OpenAI abandoned its nonprofit mission by accepting Microsoft funding and becoming for-profit. Musk, a co-founder who contributed $38 million, alleges the company betrayed its original goal of open, safe AI. Whether OpenAI breached its fiduciary obligations and founding principles is at the heart of the case. While Kalshi betting markets now support Musk's xAI in the dispute, OpenAI calls the accusations unfounded and part of a harassment pattern. The trial may have an effect on OpenAI's plans for future public markets and fundraising.