Update app.py

app.py

@@ -20,7 +20,7 @@ retriever = vectordb.as_retriever()
 # Set OpenAI key (use Secrets or .env later)
 os.environ["OPENAI_API_KEY"] = os.getenv("OPENAI_API_KEY")
 
-llm = ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0.2)
+llm = ChatOpenAI(model_name="gpt-4.1", temperature=0.2)
 
 # ✅ Prompt templates
 templates = {