Update app.py

app.py

@@ -70,7 +70,7 @@ URL: {r.get("href","")}
 llm = ChatOpenAI(
     base_url="https://api.freemodel.dev",
     api_key=FM_TOKEN,
-    model="gpt-5.4",
+    model="gpt-5.4-nano",
     temperature=0.0,
     max_tokens=1024,
 )