z-GAL MBB dust temperatures as a function of redshift shown in gray squares with their respective uncertainties. Best-fit slope estimated for the MBB is plotted with a solid black line and for GMBB with a dotted black line with the confidence interval shaded in blue. The median binned temperatures are plotted in black circles up to redshift z = 4 with a bin size of Δz = 0.5. The selection effect is shown with a gray shaded region. For comparison, we over-plot the BEARS-derived MBB dust temperatures by Bendo et al. (2023) shown as orange diamonds. Evolutionary trends from the literature are also plotted in purple (Viero et al. 2022), in red (Schreiber et al. 2018, extrapolated to z = 6), and in green (Magnelli et al. 2014, extrapolated to z = 6).