Routing with Jev to cut Opus 5.5's city-building bill
The author shows an endless city video generated entirely by Opus 5.5 and shares a router prompt where Jev only picks and scores, waking Opus only when real code needs writing.
100% code by Opus 5.5. 0% of the invoice in the post. that’s the part that should scare you. a city like this isn’t one prompt. it’s hundreds of “fix the shader”, “why is it black”, “add traffic”, every one billed at top-model rates. plenty of them a one-word answer would close. you’re paying your most expensive engineer to say yes or no. put Jev in front. it eats pick, score, yes/no for pennies and only wakes Opus when there’s real code to write. same endless city. a bill you can actually look at. router prompt ↓ Jev answers only pick / score / yes-no. anything that needs new code or a new file goes to Opus 5.5 with the file and the exact error. never send Opus a question one word can answer.
This post quotes another post: “Opus 5.5 generates an endless procedural WebGPU city in pure code”