idk, but with opencode, I spend like nothing. I built 3 fully functional (and actually good) web apps, without writing a single line of code, and it cost me $20. I mostly use gpt 5.1 codex mini for coding and grok-4 fast for planning (or codex mini only). for one pet project I use local models only (still impressive results) and electricity bill is likely going to be more expensive 🤣