These labels describe different levels of access and freedom.
- Proprietary: a vendor keeps the weights and exposes the model through a service. Users cannot run or inspect the model independently.
- Open-weight: users can download trained parameters and run them on their own hardware. The release may still omit training data, training code, or detailed methods. Its license may restrict some uses or redistribution.
- Open-source AI: the release must provide the freedoms and materials needed to use, study, modify, and share the system under a qualifying license. Open-source software around a model does not automatically make the model itself open source.
Always read the exact model license and card. Check commercial use, redistribution, acceptable-use terms, included artifacts, and whether a modified model can be shared. Downloadable weights are useful, but they describe access, not the full legal or technical openness of the system.
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