diff --git a/samples/python/hosted-agents/agent-framework/human-in-the-loop/workflow-agent-with-checkpoint-and-hitl/main.py b/samples/python/hosted-agents/agent-framework/human-in-the-loop/workflow-agent-with-checkpoint-and-hitl/main.py
index 487a36b14..c12dd60b7 100644
--- a/samples/python/hosted-agents/agent-framework/human-in-the-loop/workflow-agent-with-checkpoint-and-hitl/main.py
+++ b/samples/python/hosted-agents/agent-framework/human-in-the-loop/workflow-agent-with-checkpoint-and-hitl/main.py
@@ -1,3 +1,4 @@
+# Optimization candidate A: switched model to gpt-4o-mini.
 # Copyright (c) Microsoft. All rights reserved.
 import asyncio
 import json