FeNNol Pre-trained Models Collection
December 17, 2025 · View on GitHub
This repository contains a collection of pre-trained models compatible with the FeNNol library.
Models
- FeNNix-Bio1 (small, medium)
- ANI1x, ANI1ccx, ANI2x
- MACE-OFF23 (small, medium, large)
- MACE-MP (small, medium, large)
Installation
In order to get the model files (files with .fnx extensions), you can either clone this repository or download the desired model directly from the github interface.
Warning: Models larger than 100MB are stored using Git LFS. If you clone the repository and want to use these models, make sure to have Git LFS installed on your system.
Usage
To use the models, simply download the desired model and load it using the FeNNol library. For example, to load the MACE-OFF23 small model in an ASE calculator, use the following code:
from fennol.ase import FENNIXCalculator
from ase import build
atoms = build.molecule('H2O')
calc = FENNIXCalculator(model='MACE-OFF23/mace_off_small.fnx')
atoms.calc = calc
print("energy =",atoms.get_potential_energy())
Citation
If you use any of the models provided in this repository, please cite the corresponding papers. Please also cite this paper if you use the FeNNol library.
T. Plé, O. Adjoua, L. Lagardère and J-P. Piquemal. FeNNol: an Efficient and Flexible Library for Building Force-field-enhanced Neural Network Potentials. arXiv preprint arXiv:2405.01491 (2024)
@article{ple2024fennol,
title={FeNNol: an Efficient and Flexible Library for Building Force-field-enhanced Neural Network Potentials},
author={Pl{\'e}, Thomas and Adjoua, Olivier and Lagard{\`e}re, Louis and Piquemal, Jean-Philip},
journal={arXiv preprint arXiv:2405.01491},
year={2024}
}
Licence
Each model family is distributed under its own licence. Please refer to the corresponding model folder for more information.