Correct me if I'm wrong, but the standard model makes no prediction for the masses of any of the fundamental particles. To my knowledge, they are all input parameters. It might put certain bounds on them, but in the end they are all not predicted by the standard model itself.
This is seen as one of the big issues with the standard model, that it does not actually explain a lot of the characteristics of the fundamental particles like their couplings and masses.
This is seen as one of the big issues with the standard model, that it does not actually explain a lot of the characteristics of the fundamental particles like their couplings and masses.