Notes. The first column describes the possible input, setup, and capabilities of the software, while the remaining columns list the six independent software packages employed in this work. The tilde (∼) denotes the implemented capabilities that have not yet been extensively tested. All software can use lensed image positions with circular uncertainties as observables to constrain lens mass distributions on a single lens plane. This setup, as indicated by “[baseline]” in the corresponding rows, forms the basis for constructing the baseline models that enable direct comparison of software and models from the different modeling teams.