OPStudio is a multi-phase-field simulation platform designed for quantitative microstructure modelingacross a broad range of materials and processes. Built on a general multi-physics framework, OPStudiointegrates phase transformations, multicomponent diffusion, elasticity, plasticity, and fluid dynamicswithin a unified computational environment. The software employs spectral solvers combined with FFT-based mechanical equilibration, enabling efficient handling of complex boundary conditions and large-scale three-dimensional simulations on parallel computing architectures.This presentation highlights recent methodological advances implemented in OPStudio. A finite straincrystal plasticity module now captures large deformation behavior, including discontinuous dynamicrecrystallization under strains exceeding 100%, with full resolution of crystallographic slip systems andlattice rotation evolution. For high-temperature applications, dislocation-density-based creep modelingpredictsγ/γ′rafting morphologies under multiaxial loading conditions relevant to turbine blade serviceenvironments. The fracture mechanics module solves the Ginzburg–Landau equation with energy-basedcrack path prediction, distinguishing between intergranular and transgranular failure modes as a functionof grain boundary energy.Process-specific capabilities address industrial demands in additive manufacturing, where OPStudiomodels solidification under steep thermal gradients characteristic of laser and electron-beam processes,predicting dendrite arm spacing, microsegregation, and nucleation kinetics in multicomponent alloy sys-tems. For steel processing, the software simulates the full sequence from solidification through austenitedecomposition, martensite quenching, and tempering, including carbide precipitation kinetics. Mechan-ical properties are predicted using calibrated constitutive models.Direct coupling to thermodynamic databases (CALPHAD) enables simulation of commercial alloy com-positions without simplification. The graphical interface provides streamlined setup for complex multi-physics problems while maintaining access to the underlying numerical parameters.Future development directions include expanded corrosion modeling capabilities and continued refine-ment of coupled thermo-chemo-mechanical frameworks for degradation prediction under service condi-tions.