Comparison of MIST isochrones with emulator-based (GPR, KNN and ffNN) predictions of stellar observables at fixed ages. The initial mass range M_ini ∊ (0.65, 300) M_⊙ is sampled over a log scale with a step size δ log M_ini/M_⊙ = 5 × 10⁻⁵ to obtain the parameter space points at which discrete predictions are made. For the set of values of stellar isochrones, we chose a log sampling of the time axis to cover the full range of stellar ages τ. The theoretical MIST isochrones are color-marked, while the emulator-based point predictions are scatter-plotted in black.