diff --git a/playground/config.example.py b/playground/config.example.py
index 10a933a16..5f76b4fa1 100644
--- a/playground/config.example.py
+++ b/playground/config.example.py
@@ -1,7 +1,8 @@
 # JupyterLab configuration file for Jupyter AI local development
-# Reference: https://jupyter-server.readthedocs.io/en/latest/other/full-config.html
+# Reference: https://jupyter-ai.readthedocs.io/en/latest/users/index.html#configuring-with-openai
 
-#c.GPT3ModelEngine.api_key  = "<YOUR-API-KEY-HERE>"
+#c.GPT3ModelEngine.api_key = "<YOUR-API-KEY-HERE>"
+#c.ChatGptModelEngine.api_key = "<YOUR-API-KEY-HERE>"
 #c.DalleModelEngine.api_key = "<YOUR-API-KEY-HERE>"
 
 # Specify full path to the notebook dir if running jupyter lab from