Sign in

Open Force Field

@openforcefield.org
101 followers 19 following 80 posts
PostsRepliesMedia
Open Force Field @openforcefield.org · 05/08/2026
It's exciting to see real users testing agentic workflows that make use of our models and tools. Thanks to the Biggin lab for publicizing these results and showing the work that still needs to be done!
041
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 05/07/2026
If you're heading to #CCPBioSim2026 this week, watch out for posters by @finlayclark.bsky.social, João Morado & @asmaferiel.bsky.social describing their recent preprints. #compchem
121
Open Force Field @openforcefield.org · 10/06/2026
OpenFF will be presenting a hands-on "getting started" session at the inaugural OMSF Stack Tour. Our first workshop will take place in San Francisco on Jun 24 at UCSF. All events are free to attend and please spread the word in your circles. luma.com/ju76rpzb
luma.com
OMSF Stack Tour: San Francisco · Luma
Spend a day trying the open-source stack for molecular modeling! The Open Molecular Software Foundation is organizing the first OMSF Stack Tour, and our first…
010
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 02/06/2026
📢 New preprint: "Fast training of bespoke SMIRNOFF-format molecular mechanics force fields using machine learning potentials", by @finlayclark.bsky.social et al. chemrxiv.org/doi/full/10....
1104
Open Force Field @openforcefield.org · 12/05/2026
Have you read about our GNN model for assigning partial charges? It's at the heart of both our Sage 2.3.0 force field and the protein force field we're developing. The paper was published last month in JCTC. pubs.acs.org/doi/10.1021/...
pubs.acs.org
Developing and Benchmarking Sage 2.3.0 with the AshGC Neural Network Charge Model
Partial atomic charges are a fundamental component underlying classical molecular simulations, but assigning charges remains a computational bottleneck; many common methods rely on quantum mechanical ...
064
Open Force Field @openforcefield.org · 04/05/2026
Both of our 2026 Virtual Workshops are now available on Youtube! One on how to use our new, pytorch-based fitting stack, and one on how to use our latest models to set up paramters for simulations. #opensource #compchem youtube.com/playlist?lis...
youtube.com
OFF Virtual Workshops (2026) - YouTube
Two training workshops presented by the Open Force Field Initiative in 2026, on how to use our tools and models.
031
Open Force Field @openforcefield.org · 23/04/2026
We don't do our work in a vacuum, and neither do you. To learn how to set up simulations in solvent, check out this notebook exploring different methods for setting up a solvated system. docs.openforcefield.org/en/latest/ex...
docs.openforcefield.org
Methods for Topology solvation — OpenFF Ecosystem documentation
020
Open Force Field @openforcefield.org · 21/04/2026
Our latest Science Update video is here, and it's a big one! Science Lead @lilyminium.bsky.social, in spite of a cough, delivers 25 minutes of non-stop scientific action and high-octane thrills across all our areas of force field science. youtu.be/ZIw2JlCfSso
youtu.be
April 2026 Science Update
YouTube video by Open Force Field Initiative
221
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 09/04/2026
Passionate about force fields? Got great ideas for the future of force field design? We are looking to support applicants to the #MSCA Postdoctoral Fellowships scheme in collaboration with @openforcefield.org! Get in touch if interested! marie-sklodowska-curie-actions.ec.europa.eu/whats-new/ne...
marie-sklodowska-curie-actions.ec.europa.eu
MSCA opens €399 million call for Postdoctoral Fellowships
Postdoctoral Fellowships offer researchers holding a PhD the opportunity to acquire new skills through advanced training and international, interdisciplinary, and inter-sectoral mobility.
021
Open Force Field @openforcefield.org · 17/03/2026
Ever wanted to simulate a modified peptide, such as, I don't know, maybe semaglutide? In this video, hosted by @sbgrid.bsky.social , Josh Mitchell will teach you how to do just that using our experimental peptide force field! The tutorial takes you from 0 to GLP-1 in an hour. youtu.be/4tyxCzrBreQ
youtu.be
Open Force Field
YouTube video by SBGrid Consortium
030
Open Force Field @openforcefield.org · 09/03/2026
@sbgrid.bsky.social is hosting our own Josh Mitchell for their software seminar series tomorrow. Josh will introduce OpenFF's capabilities at modelling proteins and peptides with post-translational modifications. Register now! sbgrid.org/webinars/
sbgrid.org
Webinars
The SBGrid Consortium is an innovative global research computing group operated out of Harvard Medical School. SBGrid provides the global structural biology community with support for research computi...
010
Open Force Field @openforcefield.org · 03/03/2026
The first session of the virtual workshop "Fitting a SMIRNOFF force field with PyTorch" is coming up on March 4th! docs.openforcefield.org/en/latest/wo...
docs.openforcefield.org
2026 OpenFF Workshops — OpenFF Ecosystem documentation
010
Open Force Field @openforcefield.org · 18/02/2026
We’re pleased to announce the 2026 OpenFF Virtual Workshops! Please join us in March and April for workshops on: - Simulating Post-Translationally Modified Proteins with the OpenFF Rosemary Alpha - Fitting a SMIRNOFF Force Field with PyTorch Details linked: docs.openforcefield.org/en/latest/wo...
docs.openforcefield.org
2026 OpenFF Workshops — OpenFF Ecosystem documentation
153
Reposted by Open Force Field
Micaela Matta @micaelamatta.bsky.social · 06/02/2026
Not one but 2 (!) open #postdocjobs to work with me 1️⃣ tinyurl.com/EPSRCMattaPDRA 2-year postdoc on data-driven design and screening of organic mixed conducting materials ⚡️🔋 #omiecs Deadline: Feb 8 Ideal profile: MD or DFT skills, experience in #high-throughput workflows, strong coding skills
164
Open Force Field @openforcefield.org · 03/02/2026
#documentation makes the difference between a piece of code and a tool. @omsf.io is developing deep expertise in documenting #opensource scientific software, and now shares this expertise in a "playbook," including contributions from our own Josh Mitchell. playbooks.omsf.io/documentation/
playbooks.omsf.io
Documentation Playbook
131
Open Force Field @openforcefield.org · 14/01/2026
We’re pleased to announce the full release of the Sage 2.3.0 force field! This is identical to the previous release candidate Sage 2.3.0rc2. Sage 2.3.0 is the first OpenFF force field to use the AshGC neural network charge model. github.com/openforcefie... #compchem
github.com
Release Sage 2.3.0 · openforcefield/openff-forcefields
This release adds openff-2.3.0.offxml and openff_unconstrained-2.3.0.offxml. Sage 2.3.0 is the first OpenFF force field to use the AshGC neural network charge model to assign charges. Both vdW para...
2126
Open Force Field @openforcefield.org · 06/01/2026
New preprint describing our GNN charge model, AshGC! Since QM methods of charge assignment scale poorly to larger molecules, and are also conformation dependent, AshGC leads to major performance improvements in this critical step in force field parameterization. chemrxiv.org/engage/chemr...
chemrxiv.org
Developing and benchmarking Sage 2.3.0 with the AshGC neural network charge model
We report a new charge model and a new general small molecule force field. Here, we address the development and benchmarking of both the Open Force Field (OpenFF) AshGC charge model, as well as the Sa...
152
Open Force Field @openforcefield.org · 18/12/2025
These results are also a benchmark of our force field, Sage 2.2.0!
000
Open Force Field @openforcefield.org · 16/12/2025
The Open Force Field Consortium welcomes two new members to our Governing Board: Daniel Cole (of @colegroupncl.bsky.social ) and Thomas Steinbrecher (of Roche)!
131
Open Force Field @openforcefield.org · 25/11/2025
To showcase the unique capabilities of our upcoming force field, OpenFF 3.0 “Rosemary,” we've released an improved version of our PTM prototype workflow for parameterizing a protein with post-translational modifications. github.com/openforcefie...
github.com
GitHub - openforcefield/ptm_prototype
Contribute to openforcefield/ptm_prototype development by creating an account on GitHub.
110
Open Force Field @openforcefield.org · 17/11/2025
Jeff Wagner and Jen Clark ran a workshop at the @mdanalysis.bsky.social UGM in Arizona last week, in coordination with the @openfree.energy team.
Left to right: Mike Henry, Alyssa Travitz, Irfan Alibay, Jennifer Clark, Jeffrey Wagner, Hugo McDermott-Opeskin
021
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 13/11/2025
If you're at #ukqsar today, be sure to check out posters by @finlayclark.bsky.social, on work with @openforcefield.org, and @asmaferiel.bsky.social & @chikitng.bsky.social on computer-aided drug design methods! #compchem
013
Reposted by Open Force Field
Micaela Matta @micaelamatta.bsky.social · 29/10/2025
Glad to see this in print! Check out @hannahturney.bsky.social’s Perspective on atomistic polymer modeling out on @pubs.acs.org #ACSEditorsChoice pubs.acs.org/doi/10.1021/...
pubs.acs.org
Atomistic Polymer Modeling: Recent Advances and Challenges in Building and Parametrization Workflows
Synthetic polymers are a broad and versatile class of soft materials covering a large chemical space. “Computational microscopy” approaches such as atomistic molecular dynamics (MD) simulations are an effective tool to validate and rationalize experimental data for structure–property characterization. The predictive quality of MD simulations and the properties derived from them are primarily driven by the accuracy and relevance of the force field used to represent the system. While biomolecular simulation (nucleic acids, proteins) workflows benefit from dedicated toolkits and domain-specific force fields, the modeling of synthetic polymers has not progressed to the same extent. This perspective will discuss recent efforts to improve system building and parametrization workflows for synthetic polymers, and the unique challenges differentiating them from biopolymers. We will outline shortcomings in established workflows, review best practices for FAIR polymer simulations, and highlight new tools/workflows leveraging cheminformatics, direct chemical perception, and neural networks.
053
Open Force Field @openforcefield.org · 28/10/2025
Chapin Cavendar's paper, Structure-Based Experimental Datasets for Benchmarking Protein Simulation Force Fields, is out now in LiveCoMS. Read it for a detailed look at the great work he has been doing toward an OpenFF protein force field, and stay tuned! livecomsjournal.org/index.php/li...
livecomsjournal.org
Structure-Based Experimental Datasets for Benchmarking Protein Simulation Force Fields [Article v1.0] | Living Journal of Computational Molecular Science
063
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 15/10/2025
It's ligand-focussed day at the #CCPBioSim training week, and we've been using @openforcefield.org & @openmm.org to parameterise and run protein-ligand MD, and @mdanalysis.bsky.social & ProLIF for analysis! #compchem
173
Open Force Field @openforcefield.org · 10/10/2025
AshGC v1.0 is our first neural network charge model. It has been trained to produce charges that are comparable to OpenEye AM1-BCC-ELF10. AshGC 1.0 is identical to the previously released AshGC rc3, except it adds support for single-atom charges. docs.openforcefield.org/projects/nag...
docs.openforcefield.org
AM1-BCC GNN v1.0 — OpenFF NAGL Models 2025.9.0.post2+g9309d86.d20250909 documentation
111
Open Force Field @openforcefield.org · 10/10/2025
We’re pleased to announce Sage 2.3.0 Release Candidate 2 (rc2)! Sage 2.3.0 will be the first OpenFF force field to use the AshGC neural network charge model, which was trained to AM1BCC ELF10 charges, and allows for rapid charge assignment for molecules with hundreds or thousands of heavy atoms.
184
Open Force Field @openforcefield.org · 23/09/2025
OpenFF provides a critical resource for pharmaceutical discovery and design, producing high quality force fields that can be applied at scale without commercial license fees. Learn how your company can partner with us to invest in the future of #openscience app.reclaim.ai/m/james-omsf...
app.reclaim.ai
OpenFF / OpenFE informational meeting
Schedule a meeting with leadership of the Open Force Field and Open Free Energy projects to learn more about these projects and how to support them - Powered by Reclaim.ai
000
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 29/07/2025
The advanced bio workshop is in full swing now at the #ccp5 summer school, featuring material from ccpbiosim, @openforcefield.org, mdanalysis & @ppxasjsm.bsky.social. Expertly taught by @matteodegiacomi.bsky.social & @jjguven.bsky.social
131
Open Force Field @openforcefield.org · 24/07/2025
Hot take from our Project Director, David Mobley: We should drop bond order and no longer use aromaticity. blog.omsf.io/why-we-shoul... Do you agree, #chemsky ?
blog.omsf.io
Why We Should Drop (Graph-based) Bond Order and No Longer Use Aromaticity
Written by: David Mobley, PhD OpenFF force fields assign parameters based on queries operating on the chemical graph for molecules, via the SMARTS language. This language is rather flexible, leaving ...
200
Open Force Field @openforcefield.org · 01/07/2025
We're excited to see this work from @micaelamatta.bsky.social and @hannahturney.bsky.social in publication! They have done some really cool work with our toolkit, and pushed us to to make several performance enhancements for loading and parameterizing polymers.
031
Open Force Field @openforcefield.org · 17/06/2025
Our toolkit is designed to meet the needs of force field scientists -- that's who we are! Here's an example of how easy it is to change parameters in a force field in our format: docs.openforcefield.org/en/latest/ex... #opensource #compchem
docs.openforcefield.org
Modifying a SMIRNOFF force field — OpenFF Ecosystem documentation
022
Open Force Field @openforcefield.org · 12/06/2025
It's great to see others using NAGL to train GNN charge models. Stay tuned for our own model, coming soon!
010
Reposted by Open Force Field
Karmen Condic-Jurkic @karmencj.bsky.social · 09/05/2025
@jenkescheen.bsky.social showcased his work on @asapdiscovery.bsky.social and more recently with CharmTx, combining ML and more traditional free energy calculations. A lot, if not all, of his work is based on @openfree.energy, #openforcefield, and #alchemsicale. Read his papers for more details!
112
Open Force Field @openforcefield.org · 30/04/2025
This tool has solved some of our CI problems. #opensource #devops
010
Open Force Field @openforcefield.org · 29/04/2025
Maybe all you want to do is prepare your "ligand" (which isn't a ligand at all if it's not binding to a protein, but let's imagine it will one day) in a box of water and equilibrate the system. We have an example for that! docs.openforcefield.org/en/latest/ex...
docs.openforcefield.org
Solvate and equilibrate a ligand in a box of water — OpenFF Ecosystem documentation
000
Open Force Field @openforcefield.org · 22/04/2025
If you're looking for updates on the latest scientific progress at Open Force Field, look no further! youtu.be/kvThLGXnUrU #opensource #openscience #compchem
youtu.be
April 2025 Science Update
YouTube video by Open Force Field Initiative
050
Reposted by Open Force Field
Cole Group @colegroupncl.bsky.social · 22/04/2025
Passionate about force fields? Got great ideas for the future of force field design? We are looking to support applicants to the #MSCA Postdoctoral Fellowships scheme in collaboration with @openforcefield.org! The call opens soon, get in touch if interested ⬇️ tinyurl.com/yxbpj4y4
tinyurl.com
Postdoctoral Fellowships
The information provided on this page is a summary of the main rules and requirements for Postdoctoral Fellowships (PFs) and who can apply for them.
164
Reposted by Open Force Field
Dima Lupyan @newyorkdimka.bsky.social · 28/03/2025
The Free Energy Workshop (feworkshop.bsky.social) will happen on May 6-8th. If you're an unemployed #CompChem modeller or researcher and want to attend to network but cannot afford the $215 registration fee, please DM me.
feworkshop.bsky.social
Free Energy Workshop 2025 (@feworkshop.bsky.social)
Organizing the largest workshop concerning Free Energy calculations within the United States.
0137
Open Force Field @openforcefield.org · 01/04/2025
Our infrastructure lead, Jeffrey Wagner, prepares monthly updates on the progress of the infrastructure team. They're available on Youtube once a month on Tuesdays. youtu.be/7llP6SULP-M?... #opensource #compchem
youtu.be
March 2025 Infrastructure Updates
YouTube video by Open Force Field Initiative
020
Open Force Field @openforcefield.org · 27/03/2025
If you want to use our force field with a wide range of MD engines, you want to use Interchange. Here's an example of setting up a protein-ligand-water system and then exporting to OpenMM, Amber, LAMMPS, and GROMACS: docs.openforcefield.org/en/latest/ex... #opensource #compchem
docs.openforcefield.org
Protein-ligand-water systems with Interchange — OpenFF Ecosystem documentation
010
Open Force Field @openforcefield.org · 25/03/2025
Our science lead, @lilyminium.bsky.social prepares monthly updates on the progress of our science team. They're available on Youtube on the fourth Tuesday of the month: youtu.be/5VjQ_zI-ppU #opensource #compchem
youtu.be
March 2025 Science Update
YouTube video by Open Force Field Initiative
041
Reposted by Open Force Field
Pavan Behara @pavanbehara.bsky.social · 20/03/2025
I am thinking of starting a new tradition to share GitHub issues (or equivalent) that tickled my mind, mostly from repos I follow, interact with, or use in my work. I asked GPT for a name, and #GithubGold sounds good to me 😅. Here's one fresh off the oven - github.com/openforcefie...
github.com
Calculation slow on large conjugated system · Issue #192 · openforcefield/openff-nagl
Hello! I met an issue where the partial charge assignment process is unexpectedly slow, taking more than a day to complete. (I didn't wait for it to finish running before I exceeded the time limit,...
031
Reposted by Open Force Field
Vincent Voelz @voelzlab.bsky.social · 19/03/2025
New paper from the Voelz Lab in @pccp.rsc.org! Goold et al. performed many parallel expanded ensemble free energy simulations on @foldingathome.org using GROMACS (@gromacs.bsky.social) with OpenFF 2.0 (@openforcefield.org) to make blind logP predictions in SAMPL9 doi.org/10.1039/D4CP...
doi.org
Expanded ensemble predictions of toluene–water partition coefficients in the SAMPL9 log P challenge
The logarithm of the partition coefficient (log P) between water and a nonpolar solvent is useful for characterizing a small molecule's hydrophobicity. For example, the water–octanol log P is often us...
0114
Open Force Field @openforcefield.org · 18/03/2025
The OpenFF toolkit contains some facilities for visualizing molecules in a Jupyter notebook, which can be a convenient way to inspect the system you're setting up. docs.openforcefield.org/en/latest/ex... #compchem Share your own examples of visualizing molecules!
docs.openforcefield.org
Visualizations in the OpenFF Toolkit — OpenFF Ecosystem documentation
052
Reposted by Open Force Field
OpenFold @openfold.io · 11/03/2025
#OpenFold was highlighted in the #ProteomicsPlaybook from Front Line Genomics. You can hear from our co-founder, @lucasnivon.bsky.social, and our business manager, Mallory Tollefson, to learn about why our consortium began and where we are going. frontlinegenomics.com/proteomics-p...
frontlinegenomics.com
Proteomics Playbook 2025 - Front Line Genomics
We hope that this report inspires you to tackle proteomics in your own work and help drive advancements in this exciting field!
034
Open Force Field @openforcefield.org · 11/03/2025
Want to know what we've been up to lately?
000
Open Force Field @openforcefield.org · 11/03/2025
Ever wanted to simulate a covalent drug bound to a protein? A glyco- or lipo-protein? We have good news for you! Open Force Field just released a prototype of its officially supported Post-Translational Modification (PTM) modeling workflow for proteins. github.com/openforcefie... #compchem
github.com
GitHub - openforcefield/ptm_prototype
Contribute to openforcefield/ptm_prototype development by creating an account on GitHub.
131
Open Force Field @openforcefield.org · 06/03/2025
A very common use case for our force fields is to simulate a protein-ligand system, using OpenFF parameters for the ligand and a protein-specific force field for the protein. Here's an example of how to set up and run a simulation like this: docs.openforcefield.org/en/latest/ex... #compchem
docs.openforcefield.org
Toolkit Showcase: Prepare and run a protein-ligand simulation — OpenFF Ecosystem documentation
041
Open Force Field @openforcefield.org · 04/03/2025
Need to solvate and equilibrate a ligand in a box of water, in preparation for running a molecular dynamics simulation? We have a notebook for that: docs.openforcefield.org/en/latest/ex... #opensource #compchem Let us know what other examples you want to see, or share your own!
docs.openforcefield.org
Solvate and equilibrate a ligand in a box of water — OpenFF Ecosystem documentation
041