I Planned 10 LLM Evaluation Experiments And Only Ran 1. It Was Enough. I didn’t set out to write a benchmark paper. I wanted to answer a much dumber, much more practical question: “For the stuff I actually do at work, when do I really need a frontier model… and when am I just burning money?” So I did what engineers do when they want to be serious about this: I designed 10 experiments across real-world agent use cases with a reusable evaluation harness and a ...