What is…
LoRA (Low-Rank Adaptation)
A cheap fine-tuning method that trains a tiny add-on instead of the whole model.
Full fine-tuning updates every parameter — expensive. LoRA freezes the original model and trains a small set of extra weights that sit alongside it. The add-on is often just megabytes and can be swapped in and out.
It's how hobbyists fine-tune open models on a single GPU, and how image-model fans share custom art styles.
💡 Think of it like
Clip-on lenses for a camera: you don't rebuild the camera, you snap on a specialty lens.
🧠 Test yourself
Which of these describes LoRA?
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