Battle Drones–a vibe coded RTS with audio-based multiplayer
simonwillison.net
simonwillison.net
It all fit in my $200/month subscription, spread across two months so max of $400 there (and it didn't max me out).
My guess is several hundred dollars of API priced tokens, especially as some of the Ultracode sessions burned 10m+ based on the UI that shows token counts fit dynamic workflows. Not sure if those are input or output tokens though, it doesn't distinguish.