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Open Weights
Models whose trained weights are publicly released for download and use.
Definition
Open weights describes models whose trained parameters are publicly released, letting others download, run, fine-tune, and deploy them on their own hardware. This differs from fully open source, since the training code and data may stay private even when the weights are shared. Open-weight releases enable running the model on your own machines, customization, and offline use without calling a hosted API (a service accessed over the internet).