The model’s numbers and its recipe
Model weights are numbers an AI learns during training. Publishing them may let people run or adapt the model themselves. But weights alone do not show the code or data information used to make it.
Under the Open Source Initiative’s definition, open-source AI must also provide the necessary code and information about its training data, with the freedom to use, study, change, and share the system.
Check what “open” allows
Some models labelled “open” still restrict commercial use or sharing. Running a model may also require powerful hardware. Check what is available and what its licence permits rather than relying on the label.