NIR model spectra (900–1600 nm) generated from the self-consistent Exo-REM grid for HR 8799 b (red; multiplied by a factor of 200 for visibility) and β Pic b (blue). The spectra were produced with the species framework (T. Stolker 2023) by interpolating the precomputed Exo-REM model grid (J.-L. Baudino et al. 2015). Shaded regions mark the four NIR bandpasses adopted in this work (1040, 1265, 1425, and 1532 nm), illustrating how the filter set samples (i) the 900–1100 nm window/continuum slope and (ii) the ∼1400 nm H₂O/CH₄ absorption complex.