Update config.py

config.py

@@ -2,6 +2,16 @@
 import os
 from typing import List, Dict
 from openai import OpenAI
+from langchain_openai import ChatOpenAI, OpenAIEmbeddings
+
+llm_default = ChatOpenAI(
+    model=DEFAULT_MODEL,
+    temperature=0.5,
+    timeout=20,
+)
+
+embedding_client = OpenAIEmbeddings(model=EMBEDDING_MODEL)
+
 
 # ---------- 环境变量 & OpenAI Client ----------
 OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")