Fitting the model containing all chemical species (termed the “reference model”) to the NIRCam spectrum (grey data points) previously published by Ahrer et al. (2023b). Corresponding to our findings in Fig. 4, the 3-parameter temperature-pressure profile is used and grey (left panel) versus non-grey (right panel) are considered in separate retrievals. In each panel, post-processing is performed to isolate the contribution of water, carbon dioxide, clouds, and collision-induced absorption (CIA) due to hydrogen and helium. The natural logarithm of the Bayes factor between the retrievals with grey and non-grey clouds is 0.7, implying that both grey and non-grey cloud models explain the data equally well because both clouds are optically thin.