Infrared luminosity functions. The different panels are associated with different redshift ranges. G.A.S. model predictions are only plotted above the stellar mass completeness limit (10⁷ M_⊙). We compare our results with measurements done by Caputi et al. (2007): green squares; Rodighiero et al. (2010): light green diamonds; Gruppioni et al. (2013): blue circles; Magnelli et al. (2013): light blue pentagons; Marchetti et al. (2016): purple squares; and Koprowski et al. (2017): dark blue triangles. The solid gray line gives the total IRLF (including diffuse disk ISM, GMCs and bulge). The gray dashed line gives the IRLF that takes into account only the GMC environment and therefore only the young stars contribution. The tick marks on the left side of each panel allow us to link the comoving density to the effective number of galaxies taken into account in the luminosity function.