Left panel : sonora Diamondback hybrid gravity solar metallicity (Morley et al. 2024) and BHAC15 (Baraffe et al. 2015) cooling curves for substellar companions. The 37 objects from the ExoGRAVITY Spectral Library with age constraints available in the literature are shown by red points, and those with dynamical mass measurements have a black contour. Cooling curves for a few masses are highlighted in blue (1 mM_sol = 1.048 M_Jup). Right panel : correlation between dynamical mass constraints from the literature and evolutionary mass constraints from GRAVITY. HD 984 b lies outside the shown mass range but is still consistent between its evolutionary and dynamical mass to within 2σ.