Update on June 28 2015. A more recent release of CPLEX is now available, namely CPLEX 12.6.2 . We just announced a new release of IBM CPLEX Optimization Studio. Interested readers can read the full announcement letter . Planned dates for availability are: November 16, 2012: Electronic availability November 23, 2012: Media availability Highlights for this release include enhancements that help improve Integrated Development Environment (IDE) modeling productivity and optimizer performance.