•Anomalous Hall and anomalous Nernst effects are measured in CoSiB/Pt films.•Temperature dependences of the two effects show clear distinction.•Sharp decrease of Nernst effect can be understood from Mott relation. We report experiments on the temperature dependence of anomalous Hall and anomalous Nernst effects in amorphous CoSiB/Pt multilayer films with perpendicular magnetic anisotropy down to low temperatures. The Hall resistance decreases slowly with decrease in temperature, remaining at about 88% of the room temperature value at 25K. On the other hand, the Nernst coefficient decreases rapidly with decreasing temperature and becomes about 10% of the room temperature value even at 100K. The coercive field determined from these measurements also shows a strong change with temperature, increasing by a factor of two at 25K as compared with that at room temperature.