You only need the frontier model for one single edit Monkey see, monkey do! 🍌 /plan makes perfect sense. It really shouldn't! You've heard this pitch; you may have even shipped it. The expensive model is clearly the better architect, but it feels like a waste to use it for the entire pipeline. Why not let it do the "hard part"? Read the code, think deeply, write a precise plan. Then a model a tenth the price executes the plan. Senior architect, junior engineer. Sounds great, right? Find the red dot above, labeled Opus 4.8 + /plan†. Opus plans read-only, Gemini Flash implements: lands at $3.18