As shown in the tables, at the TightPNO convergence, the algorithm is accurate enough to yield interaction energy errors of MAE 0.06 kcal mol -1 or less in every basis set for CCSD, and 0.10 kcal mol -1 or less for CCSD(T). For the NormalPNO convergence, the MAE is typically on the order of 0.2 -0.3 kcal/mol for both CCSD and CCSD(T), with the MAE for the dispersion dominated complexes being larger, around 0.5 -0.6 kcal mol -1