copasi.org

Copasi.org is the non-profit publisher behind COPASI, a cross-platform software suite designed for the simulation and analysis of biochemical reaction networks. Built on the legacy of Gepasi, COPASI integrates deterministic, stochastic and hybrid solvers to model metabolic pathways, signal transduction cascades, gene-regulatory circuits and pharmacokinetic processes. Researchers can import SBML models or build networks interactively, then perform time-course simulations, steady-state scans, parameter scans and metabolic control analysis. The package supports parameter estimation via least-squares, genetic algorithms or particle swarm, automatically fitting models to experimental data from fluorescence plate readers, Western blots or NMR spectra. Additional modules handle optimization tasks such as enzyme-kinetics design, dose-response profiling and sensitivity analysis, while bifurcation tools explore oscillatory behavior in circadian clocks or calcium waves. COPASI exports results in CSV, XHTML or native formats and embeds a Python binding for scripting large-scale parameter sweeps on clusters. Typical academic use cases range from predicting drug-target interactions in systems pharmacology to engineering synthetic metabolic pathways in biotechnology, and the software is cited in thousands of peer-reviewed studies. COPASI is offered for free on get.nero.com, where the latest Windows build is delivered through trusted package sources such as winget, enabling single-click installation or batch deployment alongside other scientific tools.