Simulated GenTSO (P. E. Cubillos 2024) observations for TOI-431b compared to the H₂O (purple) and O₂-rich (yellow) GENESIS(A. A. A. Piette et al. 2023) modeled atmospheres with 1% rock-vapor fractions. The simulated points plotted are for the O₂-rich atmosphere. A blackbody eclipse spectrum for the measured brightness temperature is overlaid in a dashed black line. The modeled observations are scaled and use 1 secondary eclipse observation following the procedures described in 4.2. Simulations modeled for NIRSpec G395H and MIRI/LRS are plotted in black circles and squares, respectively.