Update app.py

app.py

@@ -50,7 +50,7 @@ for i in tqdm(range(0, len(split_docs), batch_size)):
 print(f"Se han indexado {len(split_docs)} chunks.")
 
 qa_chain = RetrievalQA.from_chain_type(
-    llm=ChatOpenAI(temperature=0, model_name="gpt-3.5-turbo"),
+    llm=ChatOpenAI(temperature=0.2, model_name="gpt-4o-mini"),
     chain_type="map_reduce",
     retriever = vectorstore.as_retriever(search_kwargs={"k": 10})  # más chunks
 )