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Foundation Model
A large AI model trained on vast amounts of general data, designed to be the starting point for many different applications rather than built for a single task.
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Analogy
A Swiss Army knife versus a drawer full of single-purpose tools. A foundation model is the Swiss Army knife - broad enough to be adapted for many different jobs. Fine-tuning is like sharpening one of the blades for a specific purpose. The underlying tool is the same; the specialisation makes it better at particular tasks.
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