diff --git a/api/constants/model_template.py b/api/constants/model_template.py
index c8aaba23cb83ed..42e182236ff793 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 @@
         }
     },
 
+    # 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 94406030697458..9c8ebfac6c18ba 100644
--- a/api/controllers/console/app/app.py
+++ b/api/controllers/console/app/app.py
@@ -22,7 +22,7 @@
 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/core/workflow/nodes/code/code_node.py b/api/core/workflow/nodes/code/code_node.py
index 0b46f86e9d22e7..01e4fc458311fd 100644
--- a/api/core/workflow/nodes/code/code_node.py
+++ b/api/core/workflow/nodes/code/code_node.py
@@ -15,13 +15,13 @@
 MAX_STRING_ARRAY_LENGTH = 30
 MAX_NUMBER_ARRAY_LENGTH = 1000
 
-JAVASCRIPT_DEFAULT_CODE = """function main({args1, args2}) {
+JAVASCRIPT_DEFAULT_CODE = """function main({arg1, arg2}) {
     return {
         result: args1 + args2
     }
 }"""
 
-PYTHON_DEFAULT_CODE = """def main(args1: int, args2: int) -> dict:
+PYTHON_DEFAULT_CODE = """def main(arg1: int, arg2: int) -> dict:
     return {
         "result": args1 + args2,
     }"""
diff --git a/api/services/app_service.py b/api/services/app_service.py
index 58b102f826102e..940d4eac6cf9b3 100644
--- a/api/services/app_service.py
+++ b/api/services/app_service.py
@@ -150,10 +150,10 @@ def import_app(self, tenant_id: str, data: str, args: dict, account: Account) ->
             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")
 
diff --git a/api/services/workflow/workflow_converter.py b/api/services/workflow/workflow_converter.py
index 953c5c5a3cdb73..b1b0b2f3159fee 100644
--- a/api/services/workflow/workflow_converter.py
+++ b/api/services/workflow/workflow_converter.py
@@ -131,7 +131,8 @@ def convert_app_model_config_to_workflow(self, app_model: App,
         if app_config.dataset:
             knowledge_retrieval_node = self._convert_to_knowledge_retrieval_node(
                 new_app_mode=new_app_mode,
-                dataset_config=app_config.dataset
+                dataset_config=app_config.dataset,
+                model_config=app_config.model
             )
 
             if knowledge_retrieval_node:
@@ -359,12 +360,15 @@ def _convert_to_http_request_node(self, app_model: App,
 
         return nodes
 
-    def _convert_to_knowledge_retrieval_node(self, new_app_mode: AppMode, dataset_config: DatasetEntity) \
+    def _convert_to_knowledge_retrieval_node(self, new_app_mode: AppMode,
+                                             dataset_config: DatasetEntity,
+                                             model_config: ModelConfigEntity) \
             -> Optional[dict]:
         """
         Convert datasets to Knowledge Retrieval Node
         :param new_app_mode: new app mode
         :param dataset_config: dataset
+        :param model_config: model config
         :return:
         """
         retrieve_config = dataset_config.retrieve_config
@@ -385,6 +389,19 @@ def _convert_to_knowledge_retrieval_node(self, new_app_mode: AppMode, dataset_co
                 "query_variable_selector": query_variable_selector,
                 "dataset_ids": dataset_config.dataset_ids,
                 "retrieval_mode": retrieve_config.retrieve_strategy.value,
+                "single_retrieval_config": {
+                    "model": {
+                        "provider": model_config.provider,
+                        "name": model_config.model,
+                        "mode": model_config.mode,
+                        "completion_params": {
+                            **model_config.parameters,
+                            "stop": model_config.stop,
+                        }
+                    }
+                }
+                if retrieve_config.retrieve_strategy == DatasetRetrieveConfigEntity.RetrieveStrategy.MULTIPLE
+                else None,
                 "multiple_retrieval_config": {
                     "top_k": retrieve_config.top_k,
                     "score_threshold": retrieve_config.score_threshold,
diff --git a/api/tests/unit_tests/services/workflow/test_workflow_converter.py b/api/tests/unit_tests/services/workflow/test_workflow_converter.py
index 0ca8ae135ce8dc..b4a4d6707aeb1f 100644
--- a/api/tests/unit_tests/services/workflow/test_workflow_converter.py
+++ b/api/tests/unit_tests/services/workflow/test_workflow_converter.py
@@ -206,9 +206,18 @@ def test__convert_to_knowledge_retrieval_node_for_chatbot():
         )
     )
 
+    model_config = ModelConfigEntity(
+        provider='openai',
+        model='gpt-4',
+        mode='chat',
+        parameters={},
+        stop=[]
+    )
+
     node = WorkflowConverter()._convert_to_knowledge_retrieval_node(
         new_app_mode=new_app_mode,
-        dataset_config=dataset_config
+        dataset_config=dataset_config,
+        model_config=model_config
     )
 
     assert node["data"]["type"] == "knowledge-retrieval"
@@ -240,9 +249,18 @@ def test__convert_to_knowledge_retrieval_node_for_workflow_app():
         )
     )
 
+    model_config = ModelConfigEntity(
+        provider='openai',
+        model='gpt-4',
+        mode='chat',
+        parameters={},
+        stop=[]
+    )
+
     node = WorkflowConverter()._convert_to_knowledge_retrieval_node(
         new_app_mode=new_app_mode,
-        dataset_config=dataset_config
+        dataset_config=dataset_config,
+        model_config=model_config
     )
 
     assert node["data"]["type"] == "knowledge-retrieval"