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Model Card for CLIP ViT-B/32 roberta base - LAION-2B

Table of Contents

  1. Model Details
  2. Uses
  3. Training Details
  4. Evaluation
  5. Acknowledgements
  6. Citation
  7. How To Get Started With the Model

Model Details

Model Description

A CLIP ViT-B/32 roberta base model trained with the LAION-2B English subset of LAION-5B (https://laion.ai/blog/laion-5b/) using OpenCLIP (https://github.com/mlfoundations/open_clip).

Model training done by Romain Beaumont on the stability.ai cluster.


Direct Use

Zero-shot image classification, image and text retrieval, among others.

Downstream Use

Image classification and other image task fine-tuning, linear probe image classification, image generation guiding and conditioning, among others.

Training Details

Training Data

This model was trained with the 2 Billion sample English subset of LAION-5B (https://laion.ai/blog/laion-5b/).

Training Procedure

Training with batch size 32k for 12B sample of laion2B-en, see https://wandb.ai/rom1504/open-clip/reports/clip-B-32-roberta-base--VmlldzoyOTM0NDQ3

Model is B/32 on visual side, roberta base initialized with pretrained weights on text side.


Evaluation done with code in the LAION CLIP Benchmark suite.

Testing Data, Factors & Metrics

Testing Data

The testing is performed with VTAB+ (A combination of VTAB (https://arxiv.org/abs/1910.04867) w/ additional robustness datasets) for classification and COCO and Flickr for retrieval.


The model achieves

  • imagenet 1k 61.7% (vs 62.9% for baseline)
  • mscoco 63% (vs 60.8% for baseline)
  • flickr30k 86.7% (vs 85.4% for baseline)



Acknowledging stability.ai for the compute used to train this model.



In addition to forthcoming LAION-5B (https://laion.ai/blog/laion-5b/) paper, please cite:

OpenAI CLIP paper

  title={Learning Transferable Visual Models From Natural Language Supervision},
  author={Alec Radford and Jong Wook Kim and Chris Hallacy and A. Ramesh and Gabriel Goh and Sandhini Agarwal and Girish Sastry and Amanda Askell and Pamela Mishkin and Jack Clark and Gretchen Krueger and Ilya Sutskever},

OpenCLIP software

  author       = {Ilharco, Gabriel and
                  Wortsman, Mitchell and
                  Wightman, Ross and
                  Gordon, Cade and
                  Carlini, Nicholas and
                  Taori, Rohan and
                  Dave, Achal and
                  Shankar, Vaishaal and
                  Namkoong, Hongseok and
                  Miller, John and
                  Hajishirzi, Hannaneh and
                  Farhadi, Ali and
                  Schmidt, Ludwig},
  title        = {OpenCLIP},
  month        = jul,
  year         = 2021,
  note         = {If you use this software, please cite it as below.},
  publisher    = {Zenodo},
  version      = {0.1},
  doi          = {10.5281/zenodo.5143773},
  url          = {https://doi.org/10.5281/zenodo.5143773}

How To Get Started With the Model


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