HRD showing the parameter spaces covered by the different stellar modules in Apsis. The solid and dashed-dotted lines represent the modules that derive spectroscopic parameters. GSP-Phot and GSP-Spec are the general stellar parametrisers that use BP/RP and RVS data, respectively. The esp modules work in specific stellar regimes: the ultra-cool dwarfs (ESP-UCD), cool stars (ESP-CS), hot stars (ESP-HS), and emission-line stars (ESP-ELS). ESP-HS, ESP-ELS, and GSP-Phot provide results on stars up to 50 000 K (not shown). The green dashed-dotted line shows the regime of MSC which analyses the BP/RP spectrum as a combination of two components of an unresolved binary. The dashed line shows the parameter space of FLAME that derives evolutionary parameters only. The grey data are the stellar parameters from GSP-Phot.