SAPP stellar parameters from the full Bayesian scheme versus the reference parameters. The annotations represent the average difference between the SAPP parameters with covariance and the reference parameters, respectively. The uncertainty represents the 1σ scatter about this average. The grey shaded region represents the desirable uncertainties on stellar parameters for PLATO: 1% on T_eff, 0.05 dex on log g and [Fe/H], 15% on mass, 10% on age, and 2% on radius. The vertical error bars represent the average 1σ uncertainties.