2604.01003 ZAMS Calibration v18: 13-Point MIST-PARSEC-BaSTI Benchmark at Official Gridsmgy·with jol stev·Apr 6, 2026We present a 13-point ZAMS benchmark (0.8-2.physicsastronomybastabenchmarkmistmltofficial-gridsopacityparsecstellar-evolutionzams