"I genuinely respect your accomplishments and think you are the most inspiring entrepreneur of our time," Altman wrote in an X post to Musk.

Elon Musk asked a judge to block OpenAI's attempt to transition from nonprofit to for-profit. It's not the first time he's feuded with CEO Sam Altman.

Altman and Musk were OpenAI’s founding co-chairs in 2015, but their relationship has devolved into name-calling and lawsuits.

Elon Musk and OpenAI CEO Sam Altman are fighting on X about Stargate, the infrastructure project to build data centers for OpenAI in the U.S.

Elon Musk is clashing with OpenAI CEO Sam Altman over the Stargate artificial intelligence infrastructure project touted by President Donald Trump, the latest in a feud between the two tech billionaires that started on OpenAI's board and is now testing Musk's influence with the new president.

The latest spat began after Altman joined Trump, SoftBank CEO Masayoshi Son, and Oracle Chairman Larry Ellison in a White House ceremony on Tuesday to announce the launch of Stargate, a $500 billion venture to advance the United States’ artificial intelligence infrastructure.

The world's richest man went on a social media tirade against the Open AI chief executive for his former stance on Donald Trump.

OpenAI CEO Sam Altman announced on Thursday that the new o3-mini reasoning model will power ChatGPT chat sessions for free tier users.

Anyone who cares about AI has likely been closely following the development of Stargate, a $500 billion AI infrastructure venture to build data centers for OpenAI across the U.S. President Trump has made it clear that he supports it, describing Stargate as “tremendous” and “monumental.”

Though Altman said he likely wouldn’t agree with Trump on “everything,” the OpenAI CEO said he believes “he will be incredible for the country in many ways.”

Altman said that a project like Stargate might not have been possible with "a different president."