Update app.py

app.py

@@ -19,7 +19,7 @@ def construct_index(directory_path):
     
     prompt_helper = PromptHelper(context_window=3900, num_output=256, max_chunk_overlap=20, chunk_size_limit=1024)
 
-    llm_predictor = LLMPredictor(llm=OpenAI(temperature=0.0, model_name="gpt-3.5-turbo-16k", max_tokens=num_outputs))
+    llm_predictor = LLMPredictor(llm=OpenAI(temperature=0.0, model_name="text-davinci-003", max_tokens=num_outputs, top_p=1, frequency_penalty=0, presence_penalty=0))
     
 
     documents = SimpleDirectoryReader(directory_path).load_data()