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FICO® Xpress Optimization Blog
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FICO® Xpress 9.9 Mosel 6.12 – May 2026

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FICO
Community Manager
5 months ago
Xpress Mosel is the premier algebraic modeling and programming language. Its best-in-class functionality enables operations researchers, and modeling experts to rapidly develop and deploy optimization solutions that solve complex, real-world business problems. It provides an easy-to-learn, robust way to interact with solver engines, and tightly integrates with Xpress Insight to deploy models into powerful, business user-friendly applications.

The Xpress Mosel 6.12 release includes among others the features listed below:
  • New API moselpy  Python module for embedding Mosel models into Python host programs. It allows existing users of Mosel to seamlessly use these models in Python-based workflows. It allows compiling and running Mosel models from Python, bidirectional data exchange and supports Pandas data structures, amongst other features.
  • Performance enhancements include array assignments of different index sets 'inter' operator compiled to faster code and more efficient matrix generation of problems with large number of variables and nonlinear constraints.
Visit the Xpress release notes to learn more.
Updated 5 months ago
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