diff --git a/lightrag/llm/openai.py b/lightrag/llm/openai.py
index 3339ea3a..a2bbfa23 100644
--- a/lightrag/llm/openai.py
+++ b/lightrag/llm/openai.py
@@ -138,9 +138,9 @@ async def openai_complete_if_cache(
     base_url: str | None = None,
     api_key: str | None = None,
     token_tracker: Any | None = None,
-    keyword_extraction: bool = False,  # Will be removed from kwargs before passing to OpenAI
     stream: bool | None = None,
     timeout: int | None = None,
+    keyword_extraction: bool = False,
     **kwargs: Any,
 ) -> str:
     """Complete a prompt using OpenAI's API with caching support and Chain of Thought (COT) integration.
@@ -170,14 +170,15 @@ async def openai_complete_if_cache(
         api_key: Optional OpenAI API key. If None, uses the OPENAI_API_KEY environment variable.
         token_tracker: Optional token usage tracker for monitoring API usage.
         enable_cot: Whether to enable Chain of Thought (COT) processing. Default is False.
+        stream: Whether to stream the response. Default is False.
+        timeout: Request timeout in seconds. Default is None.
+        keyword_extraction: Whether to enable keyword extraction mode. When True, triggers
+            special response formatting for keyword extraction. Default is False.
         **kwargs: Additional keyword arguments to pass to the OpenAI API.
             Special kwargs:
             - openai_client_configs: Dict of configuration options for the AsyncOpenAI client.
                 These will be passed to the client constructor but will be overridden by
                 explicit parameters (api_key, base_url).
-            - keyword_extraction: Will be removed from kwargs before passing to OpenAI.
-            - stream: Whether to stream the response. Default is False.
-            - timeout: Request timeout in seconds. Default is None.
 
     Returns:
         The completed text (with integrated COT content if available) or an async iterator
@@ -198,7 +199,6 @@ async def openai_complete_if_cache(
 
     # Remove special kwargs that shouldn't be passed to OpenAI
     kwargs.pop("hashing_kv", None)
-    kwargs.pop("keyword_extraction", None)
 
     # Extract client configuration options
     client_configs = kwargs.pop("openai_client_configs", {})
@@ -228,6 +228,12 @@ async def openai_complete_if_cache(
 
     messages = kwargs.pop("messages", messages)
 
+    # Add explicit parameters back to kwargs so they're passed to OpenAI API
+    if stream is not None:
+        kwargs["stream"] = stream
+    if timeout is not None:
+        kwargs["timeout"] = timeout
+
     try:
         # Don't use async with context manager, use client directly
         if "response_format" in kwargs:
@@ -516,7 +522,6 @@ async def openai_complete(
 ) -> Union[str, AsyncIterator[str]]:
     if history_messages is None:
         history_messages = []
-    keyword_extraction = kwargs.pop("keyword_extraction", None)
     if keyword_extraction:
         kwargs["response_format"] = "json"
     model_name = kwargs["hashing_kv"].global_config["llm_model_name"]
@@ -525,6 +530,7 @@ async def openai_complete(
         prompt,
         system_prompt=system_prompt,
         history_messages=history_messages,
+        keyword_extraction=keyword_extraction,
         **kwargs,
     )
 
@@ -539,7 +545,6 @@ async def gpt_4o_complete(
 ) -> str:
     if history_messages is None:
         history_messages = []
-    keyword_extraction = kwargs.pop("keyword_extraction", None)
     if keyword_extraction:
         kwargs["response_format"] = GPTKeywordExtractionFormat
     return await openai_complete_if_cache(
@@ -548,6 +553,7 @@ async def gpt_4o_complete(
         system_prompt=system_prompt,
         history_messages=history_messages,
         enable_cot=enable_cot,
+        keyword_extraction=keyword_extraction,
         **kwargs,
     )
 
@@ -562,7 +568,6 @@ async def gpt_4o_mini_complete(
 ) -> str:
     if history_messages is None:
         history_messages = []
-    keyword_extraction = kwargs.pop("keyword_extraction", None)
     if keyword_extraction:
         kwargs["response_format"] = GPTKeywordExtractionFormat
     return await openai_complete_if_cache(
@@ -571,6 +576,7 @@ async def gpt_4o_mini_complete(
         system_prompt=system_prompt,
         history_messages=history_messages,
         enable_cot=enable_cot,
+        keyword_extraction=keyword_extraction,
         **kwargs,
     )
 
@@ -585,13 +591,13 @@ async def nvidia_openai_complete(
 ) -> str:
     if history_messages is None:
         history_messages = []
-    kwargs.pop("keyword_extraction", None)
     result = await openai_complete_if_cache(
         "nvidia/llama-3.1-nemotron-70b-instruct",  # context length 128k
         prompt,
         system_prompt=system_prompt,
         history_messages=history_messages,
         enable_cot=enable_cot,
+        keyword_extraction=keyword_extraction,
         base_url="https://integrate.api.nvidia.com/v1",
         **kwargs,
     )