Personnel: Elon Musk at OpenAI (Co-founder & Co-Chairman)

Note: The provided source text is a current OpenAI website homepage displaying ChatGPT features, recent news articles, and business information. It does not contain any information about Elon Musk, his role at OpenAI, his title, or the dates of his employment/involvement. While the source is from OpenAI's own domain, it is not a historical or personnel record that would address the specific claims about Musk's co-founder status, co-chairman role, or employment dates (2015-12 to 2018-02). The source material is simply not relevant to verifying personnel records from OpenAI's founding period.