It's called a RAG, and it's getting very well developed for some niche use cases such as legal, medical, etc. I've been personally working on one for mental health, and please don't let anybody tell you that they're using an LLM as a mental health counselor. I've been working on it for a year and a half, and if we get it to production ready in the next year and a half I will be surprised. In keeping up with the field, I don't think anybody else is any closer than we are.