Autoregressive Image Generation with Randomized Parallel Decoding

Haopeng Li1, Jinyue Yang2, Guoqi Li2,📧, Huan Wang1,📧

1 Westlake University, 2 Institute of Automation, Chinese Academy of Sciences

TL;DR

ARPG is a novel autoregressive image generation framework capable of performing BERT-style masked modeling with a GPT-style causal architecture.

💪 FID 1.94 🚀 Fast Speed ♻️ Low Memory Usage 🎲 Radnom Order 💡 Zero-shot Inference

Usage:

You can easily load it through the Hugging Face DiffusionPipeline and optionally customize various parameters such as the model type, number of steps, and class labels.

from diffusers import DiffusionPipeline

pipeline = DiffusionPipeline.from_pretrained("hp-l33/ARPG", custom_pipeline="hp-l33/ARPG")

class_labels = [207, 360, 388, 113, 355, 980, 323, 979]

generated_image = pipeline(
    model_type="ARPG-XL",       # choose from 'ARPG-L', 'ARPG-XL', or 'ARPG-XXL'
    seed=0,                     # set a seed for reproducibility
    num_steps=64,               # number of autoregressive steps
    class_labels=class_labels,  # provide valid ImageNet class labels
    cfg_scale=4,                # classifier-free guidance scale
    output_dir="./images",      # directory to save generated images
    cfg_schedule="constant",    # choose between 'constant' (suggested) and 'linear'
    sample_schedule="arccos",   # choose between 'arccos' (suggested) and 'cosine'
)

generated_image.show()

Citation

If this work is helpful for your research, please give it a star or cite it:

@article{li2025autoregressive,
    title={Autoregressive Image Generation with Randomized Parallel Decoding},
    author={Haopeng Li and Jinyue Yang and Guoqi Li and Huan Wang},
    journal={arXiv preprint arXiv:2503.10568},
    year={2025}
}

Acknowledgement

Thanks to LlamaGen for its open-source codebase. Appreciate RandAR and RAR for inspiring this work, and also thank ControlAR.