Figure shows a Pareto plot of the accuracy vs the computational cost of the SISSO-generated models for the singlet exciton binding energy. The equations of all the models, as well as tabulated values of their cost and accuracy are provided in the ESI. Because terphenyl is a major outlier for all the exciton binding energy models (see parity plots provided in the ESI), we present the validation set RMSE with and without terphenyl, labeled "Test" and "Test 2", respectively. The exclusion of terphenyl significantly reduces the validation RMSE of all models but does not affect the selection of the best performing models out of each cost group. The SISSO group contain E C