Comparison between the observed (blue) and mock (orange) solar twin catalogs in different age bins. Top, middle, and bottom panels show results for twins with the determined ages between 1-2, 4-5, and 7-8 Gyr, respectively. Left, middle, and right panels correspond to ages determined using log g, M_G, and M_Ks, respectively, as the third input parameter together with [M/H]_curr and T_eff. In each panel, the histograms show the probability density of the initial mass M_ini (i.e., the normalized number of twins per M_ini bin), while line plots show the median relative age errors in each M_ini bins.