cut off = 0.65, top k= 30

index_retriever.py

@@ -21,7 +21,7 @@ def create_query_engine(vector_index):
         
         vector_retriever = VectorIndexRetriever(
             index=vector_index, 
-            similarity_top_k=40,  
+            similarity_top_k=30,  
             similarity_cutoff=0.65
         )