Hi paper, is in the works, we designed a bilevel optimization with rbfopt on the upper level and a linear problem on the lower level. Number of constraints are in the 1000s for the linear problem. The inputs to the lower level are 17, and a single output object. We find 400 evaluations of the lower level model for the most important object we will converge to a global minimum. I test ga’s swarm couple of other they didn’t even see the solution found by rbfopt in 800 evaluations.