retrieve more file

src/chatbot.py

@@ -80,12 +80,12 @@ def create_rag_chain():
     # 2. Create retriever
     retriever = vectorstore.as_retriever(
         search_type="similarity",
-        search_kwargs={"k": 5}
+        search_kwargs={"k": 8}
     )
     
     # 3. Create LLM
     llm = ChatOpenAI(
-        model=os.getenv("OPEN_AI_CHAT_MODEL", "gpt-4o-mini"),
+        model=os.getenv("OPEN_AI_CHAT_MODEL", "gpt-4o"),
         temperature=0.3
     )