A court case involving Elon Musk and OpenAI is underway, with Musk's lawyer reportedly seeking the return of $29 billion from OpenAI's Greg Brockman. The value of Brockman's stake in OpenAI is estimated to be nearly $30 billion. The case appears to be part of a broader dispute over control of AI technology, with details of negotiations and interactions between Musk and OpenAI representatives emerging in court filings and testimony.