Update app.py

app.py

@@ -15,7 +15,7 @@ assert ANTHROPIC_API_KEY, "Set ANTHROPIC_API_KEY in Space settings"
 
 VLLM_API = "http://localhost:8000/v1"
 
-QWEN_MODEL = "cpatonn/Qwen3-4B-Instruct-2507-AWQ-4bit"
+QWEN_MODEL = "Qwen/Qwen1.5-4B-Chat-AWQ"
 CLAUDE_MODEL = "claude-3-5-haiku-latest"
 
 open_source_client = OpenAI(api_key="EMPTY", base_url=VLLM_API)