Histogram of C/O for different planetary masses throughout the history of planet formation for each synthetic planet for the 2D accretion model (a) and 1D accretion model (b). Each histogram is normalized so that the integral is equal to unity. Shown is the C/O for all the volatiles (gas and ice) in the disk for comparison (dashed line). For the high-mass planets, the majority have exactly the same C/O as the disk.