Link to Solvers Page


Welcome to the Beta test of the next version of the NEOS Server.

We are still developing, but believe that we are stable enough to begin offering the server to the public. Please let us know if you are having trouble or something is not working right. The original version of NEOS is still available here, but will eventually be removed for this version.

There are many internal differences in this version, but the main difference that users will notice are:

  1. Email submissions will have to follow a new format. Follow the 'email' link on your favorite solver's page for more information on this new format. (email submissions should be sent to testneos@mcs.anl.gov).
  2. We have introduced an API for accessing NEOS. Users will now be able to write software that can submit jobs to NEOS, retrieve jobs results, and more using XML-RPC clients freely available for C, C++, Java, Perl, Python, Ruby, and more.
  3. A short-job queue has been introduced for many solvers. A couple of machines have been designated to only run short jobs (5 minutes or less). This should prevent the currently common occurrence of two or three large jobs hogging up all of the NEOS machines. Any job requesting this queue and running over the five minutes will be terminated.

For those of you maintaining solvers on NEOS, the process of providing solvers has also been changed. Please look here for more information.

Our optimization solvers represent the state-of-the-art in optimization software. Optimization problems are solved automatically with minimal input from the user. Users only need a definition of the optimization problem; all additional information required by the optimization solver is determined automatically.


To submit your optimization job, first click on the NEOS Solvers icon to find a suitable solver.

Link to Solvers Page

You can also view current job queues and check job progress by number and password.


NEOS Information

  • The NEOS Application Programming Interface (NEW!)
  • Downloads
  • NEOS Guide
  • metaNEOS
  • Optimization Software Guide
  • Frequently Asked Questions on
    Linear & Nonlinear Programming
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