Differences between PHOENIX and ATLAS9 models in the CMDs. From left to right and top to bottom: Gaia G_BP − G_RP vs. G, B − V vs. V, V − I_c vs. V and J − K vs. K. The Gaia filters are from Maíz Apellániz & Weiler (2018), while the standard filters are from Bessell & Brett (1988), Bessell (1990). PARSEC v1.2S isochrones of [M/H] = 0.0 and ages log(age/yr) = 8, 9, and 10 are plotted. The ATLAS9 models are only calculated for stars hotter than above 3500 K, therefore those parts of the isochrones with T_eff below 3500 K are not shown.