diff --git a/merico/github/code_task_summary/command.py b/merico/github/code_task_summary/command.py
index 895a888..37906ca 100644
--- a/merico/github/code_task_summary/command.py
+++ b/merico/github/code_task_summary/command.py
@@ -31,7 +31,7 @@ PROMPT = (
 )
 
 
-@chat_json(prompt=PROMPT, model="gpt-4-1106-preview")
+@chat_json(prompt=PROMPT)
 def generate_code_task_summary(issue_body):
     pass
 
diff --git a/merico/github/new_branch/command.py b/merico/github/new_branch/command.py
index ea9f084..c456589 100644
--- a/merico/github/new_branch/command.py
+++ b/merico/github/new_branch/command.py
@@ -26,7 +26,7 @@ PROMPT = (
 )
 
 
-@chat_json(prompt=PROMPT, model="gpt-4-1106-preview")
+@chat_json(prompt=PROMPT)
 def generate_branch_name(task):
     pass
 
diff --git a/merico/github/new_pr/command.py b/merico/github/new_pr/command.py
index 42b2f62..c66a55c 100644
--- a/merico/github/new_pr/command.py
+++ b/merico/github/new_pr/command.py
@@ -39,7 +39,7 @@ PROMPT = (
 )
 
 
-@chat_json(prompt=PROMPT, model="gpt-4-1106-preview")
+@chat_json(prompt=PROMPT)
 def generate_pr_content_llm(issue, commit_message, user_input):
     pass
 
diff --git a/merico/github/update_pr/command.py b/merico/github/update_pr/command.py
index f339f58..51ea4ad 100644
--- a/merico/github/update_pr/command.py
+++ b/merico/github/update_pr/command.py
@@ -41,7 +41,7 @@ PROMPT = (
 )
 
 
-@chat_json(prompt=PROMPT, model="gpt-4-1106-preview")
+@chat_json(prompt=PROMPT)
 def generate_pr_content_llm(issue, commit_messages):
     pass