Reference · GlossaryPEFTCustom style, format, or domain phrasing when full fine-tune is too expensive.On this pageWhen to useWhen not toExample#When to useCustom style, format, or domain phrasing when full fine-tune is too expensive.#When not toInjecting frequently changing facts — use RAG or prompt context instead.#ExamplePEFT adapter adds ~1% trainable params on top of a frozen 7B base model for your support-email tone.Learn by doing → Learn by doing →Related termsLoRAFine-tuningPre-training← All terms