StepFun's Step Code tops Terminal-Bench 2.1 and Multi-Frame with fewer tokens

StepFun's Step Code passed 72 of 89 tasks (80.9%) on Terminal-Bench 2.1, tying for the highest pass rate among evaluated harnesses while using fewer tokens than the other tied leaders. On Multi-Frame, it passed 110 of 150 tasks (73.3%) and averaged 5.09M tokens per task, the highest pass rate and lowest token use among six harnesses evaluated.