Fine-Tuning
Training a pre-trained model further on your own examples so it behaves the way you need - its tone, its format, the way it handles your kind of task. It changes behaviour rather than knowledge: for facts that change, give the model your documents instead.
Also calledfine tuningfinetuning
Where you meet this in practice
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Plain-English definitions of the AI and AI agent terms that turn up in vendor pitches, product decisions and team conversations.