Age-abundance relations for selected elements ([Al/Fe], [Si/Fe], [Ca/Fe], and [Y/Fe], from left to right). Blue dots show the GSP-Spec abundances of individual solar twins, while blue filled circles with error bars indicate the medians of [X/Fe] within each 1 Gyr age bin. Orange and green dots represent abundances from APOGEE DR17 (Majewski et al. 2017; Abdurro’uf et al. 2022) and GALAH DR4 (De Silva et al. 2015; Buder et al. 2025), respectively. The thick red line shows the linear age-abundance relation by Bedell et al. (2018) for comparison. Red filled circles and an open circle at 6.4 Gyr with error bars represent old α-enhanced stars and an s-enhanced star, respectively, from Spina et al. (2018) and Bedell et al. (2018). For each element from each survey, we applied a zero-point correction in [X/Fe] to make the abundance scale consistent with that of the age-[X/Fe] relation by Bedell et al. (2018). The ages are determined using the K_s-band magnitude, and only stars with relative age errors smaller than 50% are included. For APOGEE DR17 and GALAH DR4, we include only stars with abundance errors below 0.05 dex. We note that a small fraction of blue dots as well as one [Al/Fe] measurement from APOGEE DR17 and one [Al/Fe] measurement from GALAH DR4 fall outside the plotted range and are therefore not shown. Plots for all the elements are presented in Fig. E.3.