diff --git a/examples/debate_simple.py b/examples/debate_simple.py
index 869e02a0e..953f664f3 100644
--- a/examples/debate_simple.py
+++ b/examples/debate_simple.py
@@ -8,14 +8,17 @@
 import asyncio
 
 from metagpt.actions import Action
+from metagpt.config2 import Config
 from metagpt.environment import Environment
 from metagpt.roles import Role
 from metagpt.team import Team
 
-action1 = Action(name="AlexSay", instruction="Express your opinion with emotion and don't repeat it")
-action1.llm.model = "gpt-4-1106-preview"
-action2 = Action(name="BobSay", instruction="Express your opinion with emotion and don't repeat it")
-action2.llm.model = "gpt-3.5-turbo-1106"
+gpt35 = Config.default()
+gpt35.llm.model = "gpt-3.5-turbo-1106"
+gpt4 = Config.default()
+gpt4.llm.model = "gpt-4-1106-preview"
+action1 = Action(config=gpt4, name="AlexSay", instruction="Express your opinion with emotion and don't repeat it")
+action2 = Action(config=gpt35, name="BobSay", instruction="Express your opinion with emotion and don't repeat it")
 alex = Role(name="Alex", profile="Democratic candidate", goal="Win the election", actions=[action1], watch=[action2])
 bob = Role(name="Bob", profile="Republican candidate", goal="Win the election", actions=[action2], watch=[action1])
 env = Environment(desc="US election live broadcast")