Spectra for cloud-free solar metallicity atmospheres from the petitCODE grid together with the theoretical blackbody for four planetary masses. The age is given in color, the x- and y-axis are the same for all the figures. The temperature of the blackbodies corresponds to the temperature of the planet at the age given in color. The grey dots show the background sensitivity limits for the JWST/NIRCam filters included in this work, the black dots those for JWST/MIRI. There are 2, 3, 5, and 7 spectra shown for the 5, 20, 100, and 318 M_⊕ planet.