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MiniZinc

MiniZinc is a high-level constraint modelling language that allows you to easily express and solve discrete optimisation problems.

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Latest release: 2.9.3 (changelog)

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MiniZinc is developed at Monash University with support from OPTIMA.

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Try MiniZinc

Try one of the examples, or write your own model.

Why choose MiniZinc?

  • High-level language

    Model constraint satisfaction and optimisation problems using readable, intuitive logical constructs, with full type safety.

  • Solver independent

    Run the same model using a variety of different solver technologies, without being locked into a particular solver.

  • Pre-defined constraints

    MiniZinc features a large library of pre-defined constraints, making modelling complex relationships simple.

  • Fully featured development environment

    Use the MiniZinc IDE to write and run models, visualise search and solutions, profile performance and more.

  • In-depth learning materials

    MiniZinc has comprehensive documentation, including the tutorial, several courses, the user manual, and library documentation.

  • Integrate MiniZinc into your project

    MiniZinc can be embedded into Python and JavaScript programs, and can even be used entirely from within the browser.

Latest Release

MiniZinc 2.9.3

Released 23 May 2025

  • Add mzn_max_version_required to enable models to speficy the maximum version of MiniZinc required to run the model (issue 872).
  • Replace use of ptrdiff_t with appropriate unsigned integer type.
  • Clarify documentation example use of boolean extra flags in solver configuration files.
  • Warnings produced in solution checkers are now output as part of the checker message when running in --json-stream mode.
  • Plus 20 bugfixes!

See the full changelog.

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