Update app.py

app.py

@@ -17,7 +17,7 @@ load_dotenv()
 # Create the ChatOpenAI instance with the custom client
 chat = ChatOpenAI(
     openai_api_base=getenv("OPENAI_API_KEY"),
-    openai_api_key=getenv("OPENROUTER_API_KEY"),
+    openai_api_key=getenv("OPENAI_API_BASE"),
     model_name="nousresearch/hermes-3-llama-3.1-405b:free",
     temperature=0.7,
 )