@@ -2,4 +2,6 @@ fastapi==0.115.12
 uvicorn[standard]
 requests
 sqlmodel
-psycopg[binary]
+psycopg[binary]
+langchain
+langchain-openai

@@ -0,0 +1,20 @@
+import os
+
+from langchain_openai import ChatOpenAI
+
+
+OPENAI_BASE_URL = os.environ.get('OPENAI_BASE_URL') or None
+OPENAI_MODEL_NAME = os.environ.get('OPENAI_MODEL_NAME') or 'gpt-4o-mini'
+OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY")
+if not OPENAI_API_KEY:
+raise NotImplementedError("`OPENAI_API_KEY` is required")
+
+
+openai_params = {
+"model": OPENAI_MODEL_NAME,
+"api_key": OPENAI_API_KEY
+}
+if OPENAI_BASE_URL:
+openai_params['base_url'] = OPENAI_BASE_URL
+
+llm_base = ChatOpenAI(**openai_params)