Elon Musk lawsuit puts OpenAI's internal writings and AI prompt logs under spotlight

Private journal entries written by Greg Brockman have been read aloud in court during the ongoing legal battle between Elon Musk and OpenAI.

The entries, originally filed under seal in October 2025 and later unsealed in January 2026, reportedly detail years of internal discussions about shifting OpenAI from a non-profit organisation to a for-profit structure.

According to reports from the trial, Brockman’s writings included discussions about the company’s financial future and estimates of a path towards a personal net worth of $1 billion linked to a $30 billion company valuation.

The journal entries are being used by Musk’s legal team to support claims that OpenAI abandoned its original non-profit mission after attracting funding and public support.

Musk co-founded OpenAI in 2015 before leaving the company in 2018.

His lawsuit argues that OpenAI leadership, including chief executive Sam Altman, transformed the organisation into a profit-driven business focused on commercial growth.

The case has also highlighted concerns around digital records in corporate litigation, with internal AI chatbot prompts and communications reportedly becoming part of the discovery process.