OpenAI co-founders-turned-rivals Elon Musk and Sam Altman traded several jabs on X over the weekend. While the two have gone back and forth online plenty of times before, this latest spat was prompted by news that Apple is suing OpenAI. “Scam Altman strikes again,” Musk wrote Saturday morning in response to a post about the lawsuit. The iPhone maker filed the suit Friday in a California federal court, accusing OpenAI and two former Apple employees who now work at the AI company of stealing trade secrets related to Apple’s manufacturing processes and products still in development. Musk quickly seized on the news as another opportunity to attack Altman. “He takes scamming to a whole new level,” Musk wrote in a separate post. “He might literally love scamming more than any human alive!” he continued in yet another post.

It didn’t take long for Altman to fire back at Musk. “[H]omeboy you’re the one sellling public market investors on short-term space datacenters,” Altman wrote, referring to SpaceX’s recent IPO.

“We start flying them next year. Maybe you can come see them if your parole officer approves,” Musk replied. Altman also suggested Musk’s renewed attention is due to OpenAI’s latest AI model. “[T]here are a lot of benchmarks that suggest 5.6 sol is the best model in the world right now, but the most reliable way to tell is that elon is obsessed with me again,” Altman wrote Saturday. The latest in an ongoing fued The exchange was just the latest round in Musk and Altman’s years-long feud. Musk helped launch OpenAI with Altman and several others in 2015 but left in 2018 following disagreements over the company’s direction. He later founded the rival AI company xAI, which is now part of SpaceX.