CoRunner (COPASI Runner) is multiple optimization run manager for Copasi software.A software CoRunner is developed to apply parallel runs automatically collaborating with software COPASI for automation of optimization procedure. In case of necessity the dynamics of parallel optimization runs, which are stored in form of COPASI reports, can be visualized with software ConvAn for detailed analysis of optimization performance. CoRunner automatically stops the optimization in case of consensus of all the parallel optimization runs and returns COPASI model with the set of best values of adjustable parameters found.