New Delhi, April 30 -- A public feud that played out on social media for years is now having its day in court. Tech billionaire Elon Musk took the stand this week and described OpenAI as a "stolen charity", escalating a legal battle that is at the heart of the global artificial intelligence (AI) race.

The lawsuit, filed by Musk against OpenAI and its chief executive, Sam Altman, also a billionaire, seeks damages of around $150 billion and challenges the company's shift from a non-profit research lab to a commercial AI powerhouse.

The case comes at a time when OpenAI is updating its guiding principles, reworking key partnerships, and expanding its footprint across cloud platforms. These developments raise a broader question about control...