Elon Musk’s not-so-friendly bid to buy OpenAI for $97.4 billion caught many in the tech world by surprise, but it’s just the latest shot in a yearslong battle between Musk and Sam Altman, who co-founded OpenAI together nearly 10 years ago.

OpenAI CEO and co-founder Sam Altman appeared to shut down a reported offer from an investor group led by Elon Musk to buy the nonprofit that controls OpenAI, marking the latest back-and-forth

The OpenAI CEO quickly rejected the deal on Musk’s X platform, saying, “no thank you but we will buy Twitter for $9.74 billion if you want.”