COPT for AMPL
Cardinal Optimizer (COPT) incorporates a full suite of solvers for linear and convex quadratic mixed-integer programming. It ranks at the top of benchmark tests on continuous linear programs, and has been fully extended to handle integer variables.
Getting started with COPT
COPT downloads are available from the My Downloads page of your account at the AMPL Portal, and are included in the bundles that are used for free trials.
Summary
Developer: Cardinal Operations
Current version: 4.0.5
Problem types supported: Linear and convex quadratic optimization in continuous and integer variables.
Algorithms available: For continuous problems, primal and dual simplex, interior-point (barrier); for integer problems, branch-and-bound with presolve, feasibility heuristics, and cut generators.
Further Information
Cardinal Optimizer website
COPT-AMPL interface source code with instructions