Features distributions of extragalactic candidates from maximum probabilities classified by the GDR3 Combmod and Combmod-α using the global prior. (a) Quasar candidates. (b) Galaxy candidates. Excluding the LMC and SMC regions, class predictions from maximum probabilities of Combmod-α give 1 719 638 quasars and 2 971 433 galaxies compared to 2 909 081 quasars and 3 419 626 galaxies classified by the GDR3 Combmod. Combmod results are indicated in (a) blue for quasars and (b) orange for galaxies. Combmod-α results are showed in black.