Last March, Musk filed a lawsuit claiming OpenAI, a global leader in artificial intelligence innovation which has developed the ChatGPT chatbot, DALL-E image generator and other advanced AI-driven tools, breached promises made in its founding documents and prioritizes profit motive over serving the public good.

The billionaire is leading a group of investors in the unsolicited offer, which complicates the start-up’s plan to raise more money.

Musk’s ties to OpenAI can be traced back to 2015, when he cofounded the company with Altman alongside a group of other prominent Silicon Valley investors. The X owner left the board in 2018 due to a potential conflict of interest with Tesla, which he owns and was ramping up its focus on AI.