Update app.py

app.py

@@ -3,12 +3,12 @@ from langchain import OpenAI
 import gradio
 import os
 
-openai.api_key = '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'
+os.environ["OPENAI_API_KEY"] = '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'
 
 def construct_index(directory_path):
     num_outputs = 512
 
-    _llm_predictor = LLMPredictor(llm=OpenAI(temperature=0.7, model_name="text-davinci-003", max_tokens=num_outputs))
+    _llm_predictor = LLMPredictor(llm=OpenAI(temperature=0.7, model_name="gpt-3.5-turbo", max_tokens=num_outputs))
 
     service_context = ServiceContext.from_defaults(llm_predictor=_llm_predictor)