Elon Musk says he now regrets making comments that "went too far" about US President Donald Trump, after the pair's very public falling out included trading insults.
Musk and Trump traded threats and insults last week, after Musk denounced a Trump tax cut and spending bill as a "disgusting abomination".
Trump said in a televised Oval Office diatribe on Thursday (local time) that he was "very disappointed" after his former aide and top donor criticised his "big, beautiful" spending bill before Congress.
The pair then hurled insults at each other on social media.
Musk hit back in real time on his X social media platform, saying the Republican would not have won the 2024 election without him and slamming Trump for "ingratitude".
The tech billionaire also replied: "Yes," to a post on X saying Trump should be impeached. Trump's Republicans hold majorities in both chambers of Congress and are highly unlikely to impeach him.
Musk even posted, without proof, that Trump was referenced in government documents on disgraced financier and sex offender Jeffrey Epstein.
Epstein died by suicide in prison while awaiting trial for sex trafficking in 2019.
Musk appears to have since deleted some of his comments on his social media network, including the reference to the 'Epstein files'.
On Wednesday, the Tesla chief said he regretted the comments he made against Trump.
"I regret some of my posts about President Donald Trump last week. They went too far," Musk wrote.
Musk's post comes days after Trump said his relationship with Musk was over.
Asked if he thought his relationship with the Tesla and SpaceX chief executive was over, Trump said, "I would assume so, yeah."