Version 5.1.0 of Gurobi Optimizer is now available for download from www.gurobi.com. Gurobi Cloud has also been updated with this version. Version 5.1 focuses on performance improvements; no changes are required in your code. Full details can be found at:
http://www.gurobi.com/products/gurobi-optimizer/what's-new-in-v5.1
VIRENDRA PATIDAR