3D ExoRad GCM grid of 60 simulated planets (blue) for different host stars from M to A (T_eff [K], see Table A.1) and global planetary temperatures T_global [K]. Observation targets for JWST (yellow), PLATO (green), and CHEOPS (red) are overlaid. The hot Jupiters WASP-121 b, HATS-42 b, NGTS-17 b, WASP-23 b, and NGTS-1 b, highlighted in distinct colours, serve as test cases to evaluate the prediction accuracy of the ML models developed in this work. Grey points indicate objects from (Baxter et al. 2020).