AMPL connects you with the world’s leading optimization solvers – commercial and open source – so you can solve large-scale, complex problems with speed and confidence.
Solvers are the engines that drive optimization. With AMPL, you gain a unified modeling interface that works across a wide range of solver technologies – giving you the freedom to prototype with open-source tools, scale with commercial power, and switch between solvers with minimal effort. Whether you’re optimizing financial portfolios, energy systems, logistics networks, or manufacturing schedules, AMPL helps you get the best performance from the best solvers.
The choice of solver can dramatically impact the speed, scalability, and reliability of your optimization results. AMPL separates modeling from solving – so you can focus on building the right formulation while gaining access to a wide array of solver technologies.
With AMPL’s solver-independent design, you can:
AMPL works seamlessly with the world’s most advanced commercial solvers. These engines are built for high-performance applications where speed, reliability, and scalability are critical. From finance to energy and logistics, our commercial solver integrations help organizations solve problems that matter – faster.
For large-scale discrete optimization and operational planning.
Gurobi
A fast and powerful solver for linear and mixed-integer optimization, widely used in industry and research.
CPLEX
A high-performance solver for large-scale linear and mixed-integer problems, known for its robust algorithms.
Xpress
An advanced solver for complex linear and mixed-integer models, offering strong performance and flexibility.
Mosek
A high-performance solver for linear, quadratic, and conic optimization, trusted for financial and large-scale applications.
COPT
A fast, modern solver for linear and mixed-integer problems, offering competitive performance with flexible licensing.
For smooth optimization problems with continuous variables.
Artley's Knitro
A leading nonlinear solver designed for large-scale optimization with advanced algorithms.
CONOPT
Well-suited for smooth nonlinear problems, commonly used in engineering and economics.
LOQO
A primal-dual interior-point solver for nonlinear and quadratic programming.
SNOPT
Optimized for large-scale sparse nonlinear programs, particularly in aerospace and engineering
MINOS
A reliable solver for constrained nonlinear problems, often used in energy and logistics.
For non-convex problems and guaranteed global solutions.
Baron
A powerful global optimization solver for nonconvex problems, ensuring global optimality
LGO
A flexible solver for global and local optimization across various problem types.
LINDO Global
Handles large-scale global optimization with deterministic and heuristic methods.
Octeract
A modern solver designed for high-performance global optimization in complex systems.
AMPL includes a suite of proven open-source solvers, ready to use out of the box. These tools are ideal for prototyping, academic research, and smaller-scale deployments. With AMPL’s unified modeling interface, you can start with open-source solvers and easily transition to commercial engines as your needs evolve – without rewriting your models.
HiGHS
High-performance LP and MIP solver, developed for modern hardware with an open license.
CBC
Reliable MIP solver with active development and integration in many open-source workflows.
SCIP
Advanced MIP and MINLP solver with strong performance in research-grade problems.
Solver performance isn’t one-size-fits-all – it depends on your model’s structure, size, and constraints. AMPL makes it easy to compare solver performance objectively through our benchmarking tools and expert services.
Whether you’re choosing between commercial licenses, assessing scalability, or optimizing runtime, we can help you make the right call – grounded in data, not guesswork.
What we offer:
Upload your model, and we'll run it across multiple solvers to compare speed, robustness, and solution quality.
Get expert recommendations on solver settings, presolve strategies, and formulation improvements.
Align solver choice with your business needs - balancing cost, performance, licensing, and future growth.
Whether you’re exploring solvers for a research project, evaluating performance for production use, or just getting started with optimization, AMPL offers free, low-friction options to help you test and learn. Choose the option that fits your needs.
Ideal for learning, prototyping, and light applications
Evaluate commercial solvers with full support
Full-featured access for students, instructors, and researchers
AMPL gives you the flexibility to work with the best solvers in the world – from open-source engines for exploration to commercial powerhouses for production. Whether you’re just starting out or optimizing mission-critical systems at scale, we’ll help you choose the right tools to get the job done.
Our resources provide you with the documentation needed to implement solvers.