diff --git a/api/app/controllers/model_controller.py b/api/app/controllers/model_controller.py
index 481c520e..509f7cad 100644
--- a/api/app/controllers/model_controller.py
+++ b/api/app/controllers/model_controller.py
@@ -36,7 +36,7 @@ def get_model_providers():
 
 @router.get("", response_model=ApiResponse)
 def get_model_list(
-        type: Optional[str | list[str]] = Query(None, description="模型类型筛选（支持多个，如 ?type=LLM 或 ?type=LLM,EMBEDDING）"),
+        type: Optional[list[str]] = Query(None, description="模型类型筛选（支持多个，如 ?type=LLM 或 ?type=LLM,EMBEDDING）"),
         provider: Optional[model_schema.ModelProvider] = Query(None, description="提供商筛选(基于API Key)"),
         is_active: Optional[bool] = Query(None, description="激活状态筛选"),
         is_public: Optional[bool] = Query(None, description="公开状态筛选"),
@@ -60,11 +60,14 @@ def get_model_list(
     try:
         # 解析 type 参数（支持逗号分隔）
         type_list = []
-        if isinstance(type, str):
-            type_values = [t.strip() for t in type.split(',')]
-            type_list = [model_schema.ModelType(t.lower()) for t in type_values if t]
-        elif isinstance(type, list):
-            type_list = type
+        if type is not None:
+            flat_type = []
+            for item in type:
+                split_items = [t.strip() for t in item.split(',') if t.strip()]
+                flat_type.extend(split_items)
+
+            unique_flat_type = list(dict.fromkeys(flat_type))
+            type_list = [ModelType(t.lower()) for t in unique_flat_type]
 
         api_logger.error(f"获取模型type_list: {type_list}")
         query = model_schema.ModelConfigQuery(
@@ -89,7 +92,7 @@ def get_model_list(
 
 @router.get("/new", response_model=ApiResponse)
 def get_model_list(
-    type: Optional[str | list[str]] = Query(None, description="模型类型筛选（支持多个，如 ?type=LLM 或 ?type=LLM,EMBEDDING）"),
+    type: Optional[list[str]] = Query(None, description="模型类型筛选（支持多个，如 ?type=LLM 或 ?type=LLM,EMBEDDING）"),
     provider: Optional[model_schema.ModelProvider] = Query(None, description="提供商筛选(基于ModelConfig)"),
     is_active: Optional[bool] = Query(None, description="激活状态筛选"),
     is_public: Optional[bool] = Query(None, description="公开状态筛选"),
@@ -111,11 +114,14 @@ def get_model_list(
     try:
         # 解析 type 参数（支持逗号分隔）
         type_list = []
-        if isinstance(type, str):
-            type_values = [t.strip() for t in type.split(',')]
-            type_list = [model_schema.ModelType(t.lower()) for t in type_values if t]
-        elif isinstance(type, list):
-            type_list = type
+        if type is not None:
+            flat_type = []
+            for item in type:
+                split_items = [t.strip() for t in item.split(',') if t.strip()]
+                flat_type.extend(split_items)
+
+            unique_flat_type = list(dict.fromkeys(flat_type))
+            type_list = [ModelType(t.lower()) for t in unique_flat_type]
         
         api_logger.info(f"获取模型type_list: {type_list}")
         query = model_schema.ModelConfigQueryNew(