Comparison between the best-fitting model spectrum (red) and the observed DESI spectra (black) for DESI-312, both provided as part of the first data release of the DESI stellar catalogue (Koposov et al. 2026). From top to bottom, the panels show the red, blue, and Z arms of the spectra. The close agreement between model and data gives no suggestion of a problematic fit or unreliable atmospheric parameters.