diff --git a/nano_graphrag/_op.py b/nano_graphrag/_op.py
index 32b254e..cfa48d6 100644
--- a/nano_graphrag/_op.py
+++ b/nano_graphrag/_op.py
@@ -837,6 +837,8 @@ async def local_query(
         text_chunks_db,
         query_param,
     )
+    if query_param.only_need_context:
+        return context
     if context is None:
         return PROMPTS["fail_response"]
     sys_prompt_temp = PROMPTS["local_rag_response"]
@@ -971,6 +973,8 @@ async def global_query(
 """
         )
     points_context = "\n".join(points_context)
+    if query_param.only_need_context:
+        return points_context
     sys_prompt_temp = PROMPTS["global_reduce_rag_response"]
     response = await use_model_func(
         query,
diff --git a/nano_graphrag/base.py b/nano_graphrag/base.py
index dae48ba..b6fed83 100644
--- a/nano_graphrag/base.py
+++ b/nano_graphrag/base.py
@@ -9,6 +9,7 @@
 @dataclass
 class QueryParam:
     mode: Literal["local", "global"] = "global"
+    only_need_context: bool = False
     response_type: str = "Multiple Paragraphs"
     level: int = 2
     top_k: int = 20
diff --git a/nano_graphrag/graphrag.py b/nano_graphrag/graphrag.py
index 3e5c43e..7ca0167 100644
--- a/nano_graphrag/graphrag.py
+++ b/nano_graphrag/graphrag.py
@@ -88,7 +88,6 @@ class GraphRAG:
     cheap_model_func: callable = gpt_4o_mini_complete
     cheap_model_max_token_size: int = 32768
     cheap_model_max_async: int = 16
-    chat_model_func: callable = gpt_4o_complete
 
     # storage
     key_string_value_json_storage_cls: Type[BaseKVStorage] = JsonKVStorage
@@ -160,9 +159,6 @@ def query(self, query: str, param: QueryParam = QueryParam()):
         loop = asyncio.get_event_loop()
         return loop.run_until_complete(self.aquery(query, param))
 
-    def chat(self, messages: list[str], param: QueryParam = QueryParam()):
-        pass
-
     async def aquery(self, query: str, param: QueryParam = QueryParam()):
         if param.mode == "local" and not self.enable_local:
             raise ValueError("enable_local is False, cannot query in local mode")