Update app.py

app.py

@@ -39,7 +39,7 @@ def load_embedding_model():
 def load_llm(api_key):
     """Loads the LLM model for answering queries."""
     return HuggingFaceHub(
-        repo_id="Qwen/Qwen2.5-72B-Instruct",
+        repo_id="distributed/optimized-gpt2-1b",
         huggingfacehub_api_token=api_key,
         model_kwargs={"temperature": 0.5, "max_length": 100}
     )