No, Muon was developed by Moonshot; they've been using it in their Kimi models since Kimi K2 in 2025.

Jordan Keller worked at Moonshot? Or am I missing something? I thought he is the original author. https://x.com/kellerjordan0/status/1842300916864844014

I was wondering whether someone would bring this up :-).

Yes, you're absolutely right, and no, Jordan Keller does not work for Moonshot. He is the original author of the algorithm, so credit goes to him.

There's a lot of legwork to go from prototyping to proper development though. The reason I said what I did is because Moonshot has the first research publication on it that I'm aware of. Could definitely have used better language though, my apologies to Jordan!