Update app.py

app.py

@@ -28,7 +28,7 @@ def process_text(text_input, unit):
                 {"role": "user", "content": f"Hello! Could you solve {text_input}?"}
             ]
         )
-        return completion.choices[0].message.content
+        return response.choices[0].message.content
 
 def process_image(image_input,unit):
     if image_input is not None: