We make three comparisons between genGEO, GETEM, and GEOPHIRES in Section 3.1 to display the methodological contributions of genGEO. We validate genGEO using industry data in Section 3.1.3. In all comparisons, unless otherwise specified, we use the geologic and power cycle inputs shown in Table . As the rate factor varies widely depending on financing assumptions (Figure ), we report costs primarily using the specific capital cost ($/MW e ) instead of LCOE. All capital costs are reported in 2019 dollars and include indirect costs and contingency (Section S1.2). When LCOE is reported, the financing assumptions of Table are given. Our first comparison (Section 3.1.1) is of the cost and generation as a function of mass flowrate and is made to demonstrate the contributions of the optimization options available within genGEO.