Included Solvers for Free Licenses
See which solvers are included with free personal GAMS and GAMSPy licenses and which additional solvers are available to academic GAMSPy users.
Solvers and Algorithms
20 resources
Free GAMS and GAMSPy Licenses for Personal and Academic Use
Compare free personal and academic GAMS and GAMSPy licenses, understand their permitted uses and limits, and learn how to generate and install a license.
Expanding the Focus: Introducing the MIPfeas Benchmark
Update (July 2026): The article has been extended and includes now result from SCIP Concurrent solver. SCIP-Conc is a parallel solver for mixed-integer programming, built on SCIP and has been around for some time. Recent activities for …
Speed vs. Guarantees: A Practical MIP–NLP Trade-off for NN Robustness
A hands-on comparison of ReLU modeling in GAMSPy, MIP vs NLP, for adversarial verification on realistic networks. The workflow, code snippets, and trade-off between speed and guarantees are all explained in details.
Turning Solver Complexity into Solver Power: The GAMS Advantage
Mathematical optimization depends on solvers - yet using them effectively can be daunting. At GAMS, we turn solver complexity into solver power, providing both a unified modeling interface and deep, decades-long expertise in solver …
A Whole New Look for CONOPT
Presentation slides covering the evolution of CONOPT, recent performance and usability improvements, new APIs, and derivative-based nonlinear optimization workflows.
GPU-Accelerated Optimization with GAMS and NVIDIA cuOpt
For a long time, GPUs were essential for various AI applications and other high-performance compute applications but had limited impact on mathematical optimization. That’s changing.
APG: Optimizing Austria’s Energy Flow
The Austrian Power Grid (APG) partnered with our consulting team to optimize its electricity transmission model. As a result, model-solving time was slashed by over 60%, memory usage dropped by 80%, and various infeasibilities were …
Why Your Business Needs Optimization
This blog post discusses the necessity of business optimization through the Binary Paintshop Problem, illustrating how businesses can minimize resource usage and improve efficiency by adopting optimization strategies. Using a simple …
Progress in MINLP Solver Technology
MINLP solvers typically have a rooting in academia. This article highlights the historic performance gains of two of them, BARON and SCIP.
An Overview of Math Programming Solvers
Math programming solvers are the workhorses called upon by GAMS to produce optimal solutions to your mathematical models. This overview provides assistance when you are faced with selecting the correct solver for your particular model.
How to Tune CPLEX Options for TIMES models
A recent webinar by Evangelos Panos demonstrates how to tune CPLEX options to get more bang for your buck when running large problems such as the TIMES ESM framework.
Optimal Efficient Price Discovery in Dairy Trading Events
Global Dairy Trade trading event auctions are the leading global online marketplace for trading large volume dairy ingredients and for reference price discovery. The GDT Trading Events and GDT Pulse Auctions are powered by CRA’s Trading …
Running large models on NEOS for free
GAMS and the packaged solvers impose restrictions with regards to the problem sizes that can be solved with a free demo or community license. For academic users, there is a free alternative to run large models: **NEOS server**.
USMA
At the United States Military Academy in West Point, all students must graduate in four years. Each student's daily activities are a carefully regimented balance of academic, military, and physical requirements. The ~4,500 enrolled cadets …
Dealing with Models that are Unbounded
Optimization problems occasionally yield unbounded solutions. To find the cause one can modify the model and solve it to gain information. This is done through the imposition of “artificially” large bounds. Linear programming solvers …
New and improved GAMS links for Pyomo and JuMP
We've got some new links from Pyomo and JuMP to GAMS, which allow efficient interfacing of GAMS with your Pyomo or JuMP models.
Optimizing Power Trading Auctions at 50 Hertz
Supported by several TSOs, the 50Hertz Transmission GmbH, TSO of Eastern Germany and part of the Elia group, manages an internet platform to collect bids and execute described auctions of balancing reserves. A GAMS model helps them match …
Scaling
Learn how to diagnose and correct numerical scaling problems in GAMS models using scaling attributes, GAMSCHK, CONVERT, and solver diagnostics.
Misbehaving Model – Infeasible
Learn how to diagnose infeasible GAMS models by adding artificial variables, analyzing distorted marginals, and isolating conflicting equations and variable bounds.