Update app.py

app.py

@@ -34,7 +34,7 @@ article = """
 
 load_dotenv()
 openai.api_key = os.getenv('OPENAI_API_KEY')
-MODEL = "gpt-4"
+MODEL = "gpt-3.5-turbo-16k"
 
 def get_filetext(filename, cache={}):
     if filename in cache:
@@ -58,7 +58,7 @@ class OpenAI:
         
         # ChatCompletion APIに渡すデータを定義する
         data = {
-            "model": "gpt-4",
+            "model": "gpt-3.5-turbo-16k",
             "messages": [
                 {"role": "system", "content": constraints}
                 ,{"role": "system", "content": template}