Update app.py

app.py

@@ -11,7 +11,6 @@ if not OPENAI_API_KEY:
 client = OpenAI(api_key=OPENAI_API_KEY)
 
 global_system_prompt = None
-global_model = 'gpt-4'
 
 def encode_image(image_path):
     with open(image_path, "rb") as image_file:
@@ -48,7 +47,7 @@ def convert_history_to_openai_format(history):
 def bot(history):
     global global_model
     response = client.chat.completions.create(
-        model=global_model,
+        model='gpt-4o',
         messages=convert_history_to_openai_format(history)
     )
     print(response)