Jev handles decision forks, cutting Opus bill from $110 to $4 a day
The author hands multiple-choice decisions to Jev while Opus keeps hard reasoning, with each pick returning in ~100ms and free output tokens, saving about $3,180 a month.
Jev + Claude Opus 5.5 is f*cking dangerous hand the decision forks to Jev and one agent's bill drops from about $110 a day to $4 i still haven't found a better way to run Opus 4 calls Opus never has to make again: -> which project notes to load before context fills -> which easy steps go to a faster worker -> how to recover when a tool breaks, without blind retries -> which quick checks run before the full test suite Opus keeps every hard reasoning step Jev just picks from options the harness already tested each pick comes back in about 100 ms, and Jev's output tokens are free Jev engineering in one line: Opus gets the essay questions, Jev gets the multiple choice that's about $3,180 a month off the same workload numbers like that get people promoted read the paper in the video first, then the full Jev guide:
This post quotes another post: x.com/mr_buzzoni/status/2104783226833186920