GALAH’s ages of cluster stars compared to isochronal ages. ‘Too young’ means that the GALAH ages are smaller than the isochronal ages, and ‘too old’ means the GALAH ages are larger. Background distribution shows all GALAH DR4 stars. Isochrones for ages 10 Myr, 100 Myr, 1 Gyr, and 10 Gyr and solar metallicity are plotted with solid lines. An isochrone for the age of 10 Gyr and metallicity of [M/H] = −0.5 is plotted with a dashed line.