Update app.py

app.py

@@ -121,11 +121,39 @@ def get_related_papers(title:str, max_results:int)->list:
         
 
 
+MODEL_IDS = [
+    'https://wxknx1kg971u7k1n.us-east-1.aws.endpoints.huggingface.cloud/',
+    'https://jc26mwg228mkj8dw.us-east-1.aws.endpoints.huggingface.cloud/', 
+    # Add here wherever model is working for you
+]
+
+def is_model_overloaded(model_url):
+    """Verify if the model is overloaded doing a test call."""
+    try:
+        response = requests.post(model_url, json={"inputs": "Test"})
+        if response.status_code == 503:  # 503 Service Unavailable = Overloaded
+            return True
+        return False
+    except requests.RequestException:
+        return True  # if there are an error is overloaded
+
+def get_available_model():
+    """Select the first model available from the list."""
+    for model_url in MODEL_IDS:
+        if not is_model_overloaded(model_url):
+            return model_url
+    return MODEL_IDS[0]  # if all are failing, use the first model by dfault
+
+Selecting one available model
+selected_model_id = get_available_model()
+
+
+
 final_answer = FinalAnswerTool()
 model = HfApiModel(
 max_tokens=2096,
 temperature=0.5,
-model_id='https://wxknx1kg971u7k1n.us-east-1.aws.endpoints.huggingface.cloud',# it is possible that this model may be overloaded
+model_id=selected_model_id,
 custom_role_conversions=None,
 )