Resource Opening up ChatGPT

Opening up ChatGPT: tracking openness of instruction-tuned LLMs

A multidimensional view of what “open” means for an AI model.

Opening up ChatGPTPublic source

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Opening up ChatGPT’s historical leaderboard and its notice directing readers to the European Open Source AI Index.
View full preview Original source artwork · Opening up ChatGPT website, captured 13 October 2026. View in context ↗
  • Open source
  • Transparency
  • Model selection

In this reference

A historical comparison of model openness across code, training data, weights, documentation and access. The project is no longer updated and points readers to the European Open Source AI Index.

Cite the original work

Andreas Liesenfeld & Alianda Lopez & Mark Dingemanse. Opening up ChatGPT: tracking openness of instruction-tuned LLMs [Resource]. Opening up ChatGPT. https://opening-up-chatgpt.github.io/

View BibTeX
@misc{opening_up_chatgpt,
  author = {Andreas Liesenfeld and Alianda Lopez and Mark Dingemanse},
  title = {{Opening up ChatGPT: tracking openness of instruction-tuned LLMs}},
  howpublished = {Opening up ChatGPT},
  url = {https://opening-up-chatgpt.github.io/}
}
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