diff --git a/api/constants/model_template.py b/api/constants/model_template.py
index c8aaba23cb..42e182236f 100644
--- a/api/constants/model_template.py
+++ b/api/constants/model_template.py
@@ -1,3 +1,5 @@
+import json
+
 from models.model import AppMode
 
 default_app_templates = {
@@ -10,6 +12,35 @@ default_app_templates = {
         }
     },
 
+    # completion default mode
+    AppMode.COMPLETION: {
+        'app': {
+            'mode': AppMode.COMPLETION.value,
+            'enable_site': True,
+            'enable_api': True
+        },
+        'model_config': {
+            'model': {
+                "provider": "openai",
+                "name": "gpt-4",
+                "mode": "chat",
+                "completion_params": {}
+            },
+            'user_input_form': json.dumps([
+                {
+                    "paragraph": {
+                        "label": "Query",
+                        "variable": "query",
+                        "required": True,
+                        "default": ""
+                    }
+                }
+            ]),
+            'pre_prompt': '{{query}}'
+        },
+
+    },
+
     # chat default mode
     AppMode.CHAT: {
         'app': {
diff --git a/api/controllers/console/app/app.py b/api/controllers/console/app/app.py
index 9440603069..9c8ebfac6c 100644
--- a/api/controllers/console/app/app.py
+++ b/api/controllers/console/app/app.py
@@ -22,7 +22,7 @@ from core.tools.utils.configuration import ToolParameterConfigurationManager
 from core.tools.tool_manager import ToolManager
 
 
-ALLOW_CREATE_APP_MODES = ['chat', 'agent-chat', 'advanced-chat', 'workflow']
+ALLOW_CREATE_APP_MODES = ['chat', 'agent-chat', 'advanced-chat', 'workflow', 'completion']
 
 
 class AppListApi(Resource):
diff --git a/api/services/app_service.py b/api/services/app_service.py
index 58b102f826..940d4eac6c 100644
--- a/api/services/app_service.py
+++ b/api/services/app_service.py
@@ -150,10 +150,10 @@ class AppService:
             if not workflow:
                 raise ValueError("Missing workflow in data argument "
                                  "when app mode is advanced-chat or workflow")
-        elif app_mode in [AppMode.CHAT, AppMode.AGENT_CHAT]:
+        elif app_mode in [AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.COMPLETION]:
             if not model_config_data:
                 raise ValueError("Missing model_config in data argument "
-                                 "when app mode is chat or agent-chat")
+                                 "when app mode is chat, agent-chat or completion")
         else:
             raise ValueError("Invalid app mode")