Something isn’t open-source because you get everything that went into making it. Something is open-source if you can change it (relatively) easily. The GPL and open-source definition both refer to “the preferred form for making modifications”. The preferred form for modification in the Nvidia driver’s case is the source code. The preferred form for modification in this case is the weights.
Open-source as a concept doesn’t really correspond well with LLMs but to the extent that it does, access to the training data is not required because that training data is not the preferred form for making modifications.
