The Open Source Initiative is working towards a definition.
This is AI generated audio with Python and 11Labs.
Source code: https://github.com/natolambert/interconnects-tools
Original post: https://www.interconnects.ai/p/defining-open-source-ai

0:00 On the current definitions of open-source AI and the state of the data commons
3:17 Reasons to not mandate fully released data
4:24 Sufficient but not exhaustive data docs
5:22 Frustration with the data commons
7:04 We need more examples to define the definition

Fig 1: https://huggingface.co/datasets/natolambert/interconnects-figures/resolve/main/defining-open-source/img_005.png