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Gurobi

Gurobi for AMPL

Gurobi’s outstanding performance has been demonstrated through leadership in public benchmark tests and dramatic improvement in solve times year after year. Built from the ground up using the latest developments & techniques, Gurobi’s extremely robust code ensures numerical stability, correctness of results, and scalability.

  We are pleased to announce the first beta release of an enhanced AMPL-Gurobi interface
  that provides significantly extended modeling support for logical and nonlinear operators.
  Extensions are supported through Gurobi’s built-in “general constraints” and through
  linearizations performed by the AMPL-Gurobi interface, with options to switch between
  alternative approaches where appropriate.

  The enhanced AMPL-Gurobi interface is available as x-gurobi in all contexts where we
  provide Gurobi distributions. To try out its new features, refer to our x-Gurobi Modeling Guide.  

Summary

Developer: Gurobi Optimization, Inc.

Current version: 9.5

Problem types supported: Linear and quadratic optimization in continuous and integer variables.

Special forms detected: Convex and non-convex quadratic expressions in objectives and constraints; conic quadratic constraints; indicator constraints.

Algorithms available: For continuous problems, primal and dual simplex, interior-point (barrier); for integer problems, advanced branch-and-bound with presolve, feasibility heuristics and cut generators.

Special features: Global optimization of non-convex quadratic problems. Shared-memory parallel processing for barrier, branch-and-bound. Distributed concurrent optimization and tuning to leverage multiple machines. Streamlined access to cloud services. Special facilities for multi-objective optimization and infeasibility diagnosis.

Further information

Gurobi for AMPL User’s Guide including option descriptions (9.5 coming soon)
Gurobi for AMPL 9.5 option quick reference
Gurobi-AMPL interface source code with makefiles and instructions

What’s New in Gurobi 9.5