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OPLS4 & OPLS5 Force Fields

Modern, comprehensive force fields for accurate molecular simulations

OPLS4 & OPLS5 Force Fields

Improve the quality of your computational predictions with Schrödinger’s state of the art force fields

Force fields are used in molecular simulations to describe the interactions between atoms in a system. Having an accurate force field is at the heart of obtaining useful molecular structures and predicting relative energies, and yet many in silico programs employ force fields that are years, if not decades, old and suffer from lack of sufficient coverage for many common molecular motifs.

OPLS4 and OPLS5 are highly accurate, modern force fields with comprehensive coverage of chemical space for both drug discovery and materials science applications. They build upon the extensive coverage and accuracy achieved in previous OPLS versions by improving the accuracy of functional groups that have presented significant modeling challenges in the past.

New OPLS5: A polarizable force field (Beta)

Improved relative binding FEP+ and Desmond model accuracy with the addition of explicit polarization in OPLS5 for polarizable atoms, molecular ions, and cation-pi interactions

Key Benefits of Schrödinger OPLS

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Continuous scientific development by leading force field experts
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Backed by state of the art quantum engine (Jaguar) and extensive experimental validation
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Broad coverage of chemical space for small molecules, biologics and materials science applications
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Easily extendible into novel project-specific chemistry with Force Field Builder

Applications for drug discovery

Obtain more accurate predictions of binding affinity

OPLS produces accurate predictions of binding free energies in FEP+, leading to more accurate rank ordering among congeneric series of compounds.

Predict binding modes of novel scaffolds

OPLS aids in accurately predicting binding modes of novel scaffolds with advanced induced fit docking methods in IFD-MD.

Perform accurate molecular dynamics simulations

OPLS helps elucidate mechanisms of action and interaction energies captured by accurately modeling molecular dynamics with Desmond.

Improve conformational analyses

OPLS provides a more accurate description of torsional energies and leads to improved conformational analyses and docking poses in Glide, ConfGen, MacroModel, and Prime.

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Force Field Builder

Efficient tool for optimizing custom torsion parameters in OPLS4

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Efficient molecular dynamics (MD) simulation tool for predicting liquid viscosity and diffusions of atoms and molecules


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Browse the list of peer-reviewed publications using Schrödinger technology in related application areas.

Materials Science
Structure and energetics of hydroxyl-terminated polybutadiene via density functional theory
Materials Science
Benzene Tetraamide: A covalent supramolecular dual motif in dynamic covalent polymer networks
Materials Science
Length-scale discrepancy in the properties of epoxy resin specimens
Materials Science
Probabilistic approach to low strain rate atomistic simulations of ultimate tensile strength of polymer crystals
Materials Science
Designed for circularity: Chemically recyclable and enzymatically degradable biorenewable Schiff Base polyester-imines
Materials Science
Whole-cell mediated carboxylation of 2-Furoic acid towards the production of renewable platform chemicals and biomaterials
Materials Science
Investigation of drug-polymer miscibility and design of ternary solid dispersions for oral bioavailability enhancement by Hot Melt Extrusion
Materials Science
Molecular mechanisms involved in the chemical instability of ONC201 and methods to counter Its degradation in solution
Materials Science
Whole-cell mediated carboxylation of 2-Furoic Acid towards the production of renewable platform chemicals and biomaterials
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Drug aggregation of sparingly-soluble ionizable drugs: Molecular dynamics simulations of Papaverine and Prostaglandin F2α

Training & Resources

Online certification courses

Level up your skill set with hands-on, online molecular modeling courses. These self-paced courses cover a range of scientific topics and include access to Schrödinger software and support.


Learn how to deploy the technology and best practices of Schrödinger software for your project success. Find training resources, tutorials, quick start guides, videos, and more.