Vitalik Buterin: 'Open weight is not open source' on AI models
wonderwomancode · x · 2026-11-07
Ethereum founder Vitalik Buterin offered a sharp take on AI models: "Open weight is not open source."
The line resonated widely — open-weight models let anyone download and run the parameters, but usually lack the training data, training code, and reproducibility that the open source definition requires, so the two labels shouldn't be conflated.
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