Defining Open-Weight: What It Means

Open-weight models make their trained parameters (weights and biases) publicly accessible, allowing users to download, run, fine-tune, and study the model's behavior, though typically without the full training code or dataset.

Sources

• Open Weights: not quite what you've been told - Open Source Initiative
• Open-Weight AI Models: What They Are, and Why OpenAI's Next Move Matters - Medium
• AI models explained: open source vs. open weight vs. closed - Hello Future
• Beyond the Buzz: Making Sense of Open-Weight AI in the Enterprise | Box Blog
• Open-weights Model | LLM Knowledge Base - Promptmetheus
• What is an Open-Weight Model? - Stanford HAI

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