Look at it like this:
- Fine tuning: Difficult, time-consuming, slow, takes time to add new information, costs a lot more.
- RAG: Can be free if you use free options like Chrome, Weaviate, or Postgres with Vector Plugin. Really fast. Once you set it up, you just need to upload a document, and it's available for GPT to answer with.
I'm using RAG for a client right now, and it was a breeze. Really easy, especially if you use something like Langchain. Compared to fine-tuning, it's a lot easier, cheaper, and faster...