Quartet: Native FP4 Training Can Be Optimal for Large Language Models

This is the official code for the Quartet FP4 training paper

Currently, this repository is work in progress. We provide code for reproducing the accuracy experiments, and will release kernels for the performance experiments at a later time.

Quickstart

Create a conda environment and install dependencies (we recommend Python 3.11):

conda create -n env python=3.11
conda activate env

Install the requirements (we recommend to install torch from specific channels and compile fast_hadamard_transform from source):

pip install -r requirements.txt

Run a pseudo-quantization e2e MXFP4 pre-training with:

bash main_setup.sh

The above command trains a 30M parameters model with the Llama-style architecture on 3B tokens.

MXFP4 Kernels

Coming soon...

Cite This Work

@misc{castro2025quartetnativefp4training,
      title={Quartet: Native FP4 Training Can Be Optimal for Large Language Models}, 
      author={Roberto L. Castro and Andrei Panferov and Soroush Tabesh and Oliver Sieberling and Jiale Chen and Mahdi Nikdan and Saleh Ashkboos and Dan Alistarh},
      year={2025},
      eprint={2505.14669},
      archivePrefix={arXiv},
      primaryClass={cs.LG},
      url={https://arxiv.org/abs/2505.14669}, 
}