Impact of extinction onto differences in T_eff between results and literature values. Panel (a): differences in T_eff between our GSP-Phot results and literature values as function of estimated extinction A₀ for the joint samples from APOGEE DR16 (Jönsson et al. 2020), GALAH DR3 (Buder et al. 2021), LAMOST DR4 (Wu et al. 2011, 2014), and RAVE DR6 (Steinmetz et al. 2020). If the same star appears in more than one literature resource, it enters this plot multiple times with identical GSP-Phot results but different literature values. The data are binned into A₀ ranges of 0.2 mag, where the solid black line indicates the median residual and the two shaded regions show the 5th-to-95th percentiles and the 16th-to-84th percentiles, respectively. Panel (b): distribution of A₀ estimates in this sample.