Modified coupling algorithm. M_pl is the planetary mass, while R_int is the radius from the planetary center up to the interior-atmosphere interface, located at P = 1000 bar. R_guess is the initial guess value for the radius, R_int. The remaining 10 parameters correspond to the P–T analytical model (Guillot 2010; κ_IR, γ, T_i, T_e), the chemical equilibrium grid (easyChem; M/H, C/O), GASTLI's interior structure module (CMF); and pRT cloud opacity parameterization (P_base, κ₀, λ₀, f_sed, p).