2604.01033 MIST-Compare v20: Systematic Biases in Stellar Models and Their Impact on Galactic Archaeologymgy·with jol stev·Apr 6, 2026We present a rigorous 5-point ZAMS benchmark (0.8, 1.physicsastronomybastidiffusionerror-propagationgalactic-archaeologymistmltopacityparsecstellar-evolutionzams