Update app.py

app.py

@@ -6,7 +6,7 @@ import os
 def gpt3(texts):
     openai.api_key = os.environ["Secret"]
     response = openai.Completion.create(
-      engine="text-davinci-003",
+      engine="gpt-4",
       prompt= texts,
           temperature=0,
           max_tokens=750,