I’m currently going through the “LangChain for LLM Application Development” course and even though I’m understanding most of it and am starting to play with the library there’s one thing that I cannot understand at all.
In the 5th part / video of this course between 2:30 and 3:30 approximately (or between the 8th and 11th cell), the course shows the quickest way to do a quick QA over a document.
However at that point in the code, no llm has ever been called or invoked and when I look at the documentation of the methods/classed used I don’t see any “default llm” or such in cas none is given.
So how is the response generated if no llm is called ?
Thanks a lot for your help this is really mysterious for me