diff --git a/defog_utils/utils_llm.py b/defog_utils/utils_llm.py
index de3521d..994163a 100644
--- a/defog_utils/utils_llm.py
+++ b/defog_utils/utils_llm.py
@@ -52,7 +52,7 @@ def __post_init__(self):
             
             if len(potential_model_names) == 1:
                 model_name = potential_model_names[0]
-            else:
+            elif len(potential_model_names) > 1:
                 # if there are multiple potential matches, then find the one with the longest prefix
                 model_name = max(potential_model_names, key=len)