Meta’s upcoming Community Notes feature for monitoring misinformation will use some technology developed by Musk’s X for its similar service.

Mark Zuckerberg and Elon Musk were once poised to fight in a cage match in 2023, before Zuckerberg called it off, saying that Musk was "not serious." Now, the two billionaires have gone from the brink of battle to using each other's technology.

Meta will test Community Notes in the US starting March 18. This uses X's technology and allows users to flag false or misleading content. About 200,000 users have signed up to contribute. The system replaces third-party fact-checking with a crowd-sourced model.

Meta has said its new content moderation tool incorporates the same open-source algorithm that powers X’s Community Notes and it plans to modify the algorithm to better serve its Facebook, Instagram a

Meta will begin one of the company's most significant overhauls ever for how it fact-checks information on its platforms. On March 18, Meta

Meta will begin testing its Community Notes feature, which replaces fact-checking with crowdsourced commentary, next week. It relies on X's open-source tech.