I'll let you read a few articles about this lawsuit, but basically they said to Musk (and frankly, to everyone else) that they were committed to the non-profit model, while behind the scenes thinking about "making the billion" and turning for-profit.
Sorry, not leaked emails, but it's the Greg Brockman's diary and leaked texts.
I didn't find the original lawsuit documents, but there's a screenshot in this video: https://youtu.be/csybdOY_CQM?si=otx3yn4N26iZoN7L&t=182 (timestamp is 3:02 if you don't see it)
There's more details about the behind-the-scenes and greg brockman's diary leaks in this article: https://www.techbuzz.ai/articles/open-ai-lawsuit-exposed-the... Some documents are made public thanks to the Musk-OpenAI trial.
I'll let you read a few articles about this lawsuit, but basically they said to Musk (and frankly, to everyone else) that they were committed to the non-profit model, while behind the scenes thinking about "making the billion" and turning for-profit.