LAION

weights

open(56 ungated laion/CLIP-* checkpoints on the Hub - 50 MIT, 4 Apache-2.0 and 2 declaring none)

data

open(the DataComp-1B corpus behind the DataComp.XL checkpoints is published ungated under CC-BY-4.0

code

open(open_clip ships the full contrastive pretraining pipeline - data loading, training loop, distributed launch scripts and ImageNet zero-shot evaluation)

license

MIT(OSI)

The top rung, and the clearest case for it in this set: the corpus, the code that consumed it and an OSI licence over the weights. The one wrinkle is that the corpus these checkpoints were actually trained on was withdrawn in 2023 and the name now resolves to the re-filtered ReLAION release, which is auto-gated - a click-through, not an approval, so it is still released rather than merely documented.

• https://huggingface.co/api/datasets/mlfoundations/datacomp_1b recorded 2026-09-11

  gated: false; license cc-by-4.0 - DataComp-1B, the corpus behind the DataComp.XL checkpoints, is published and ungated. This is the firmer footing for data:open than the LAION-2B path, whose original name now redirects to a re-filtered successor behind a gate.

• https://huggingface.co/laion/CLIP-ViT-H-14-laion2B-s32B-b79K/raw/main/README.md recorded 2026-09-11

  `license: mit`; 'A CLIP ViT-H/14 model trained with the LAION-2B English subset of LAION-5B ... using OpenCLIP'; a Training Data section naming the 2-billion-sample English subset.

• https://huggingface.co/api/datasets/laion/relaion2B-en-research-safe recorded 2026-09-11

  `id: laion/relaion2B-en-research-safe`, `gated: auto`, `private: false`, `disabled: false` - and the request for laion/laion2B-en redirects here.

• https://raw.githubusercontent.com/mlfoundations/open_clip/main/README.md recorded 2026-09-11

  'This repository is focused on training CLIP models'; documents `python -m open_clip_train.main` with train-data, epochs and imagenet-val arguments, plus single-node and SLURM multi-node launch recipes.

• https://raw.githubusercontent.com/mlfoundations/open_clip/main/LICENSE recorded 2026-09-11

  the MIT permission grant verbatim - 'to deal in the Software without restriction' - over a 2012-2021 copyright by the open_clip authors.