How to govern LLM in VectorStoreInCreator?

[AndreasLed]

Hi, I am wondering if it's only me or if anybody else has the same question....and can probably help me understand how to solve this.

I built a QA over documents with VectorstoreIndexCreator and found the possibilities below to adjust some parameters.
I am wondering, thought, if I can change the parameters of the LLM for the query of the index, like changing the llm, temperature, length of the answer etc.
Couldn't find any parameters to twist the line:
data = index.query(query)_

Would appreciate very much if anybody could give me some guidance, Thx!!!