I understand there are quite a few GUT candidates. I also understand that among these candidates some are considered by the theoretical physics community to be more likely to be correct than others. I am curious about what each of the various GUT candidates predicts as the time (relative to other cosmological events) and/or the temperature at which GUT symmetry breaking occurred. I would also appreciate for each candidate an estimate of the likelihood it will eventually turn out to be accepted as the "correct" GUT. I would like to calculate for time and temperature composite (logarithmic) mean estimates (with error ranges) weighted by the likelihood estimates.