Twyman et al. benchmark their greedy algorithm against a set of "exact" results by computing the decomposition of a closed system of materials (Problem 2) and comparing the results (-Δ𝐻𝐻 decomp ) to the energy above the convex hull (EATCH) values retrieved from Materials Project (MP-EATCH). Figure of their paper depicts a histogram of differences between EATCH estimated by greedy algorithm (Lazy-F3) and MP-EATCH, denoted ΔEATCH here, and they report an MAE of 39.5 meV/atom. We reproduced this MAE, but as noted in Section III.A, inconsistencies in the MP-EATCH entries make this an unreliable target. In addition, although not stated in the paper, it appears that their Figure represents data truncated with the lower limit of ΔEATCH set to -50 meV/atom. Details supporting these claims can be found in section III of Supporting Information. In summary, we found that a proper accounting (using exact EATCH rather than the values found in the Materials Project) actually reduces their MAE to 27.3 meV/atom. However, as shown in Table , this is not a reliable benchmark for the oxidation reactions for which the MAE of Lazy-F3 is 119 meV/atom.