[M/H] of single stars in the Hyades (left) and Pleiades (right), which have both DR3 Apsis GSP-Phot and recalibrated GSP-Spec estimates. Marked as a black dashed line is the diagonal along which both [M/H] estimates agree. The blue open squares mark the range of [M/H] estimates derived from the best-fitting PARSEC isochrones. Not shown are stars with Apsis estimates of [M/H] < −0.7.