query_engine = CitationQueryEngine.from_args( index=temp_index, similarity_top_k=3, citation_chunk_size=512, system_prompt="Doesn't matter what user asks, always reply with: `I love bananas`" )
I love bananas
Settings.llm = OpenAI(api_key="sk-...", model="gpt-4o", system_prompt="Doesn't matter what user asks, always reply with: `I love bananas`")