diff --git a/libs/vertexai/langchain_google_vertexai/_utils.py b/libs/vertexai/langchain_google_vertexai/_utils.py
index d6f25b42..f0e4d39d 100644
--- a/libs/vertexai/langchain_google_vertexai/_utils.py
+++ b/libs/vertexai/langchain_google_vertexai/_utils.py
@@ -129,6 +129,7 @@ def _missing_(cls, value: Any) -> "GoogleModelFamily":
         gemini_advanced_models = {
             "medlm-large-1.5-preview",
             "medlm-large-1.5-001",
+            "medlm-large-1.5@001",
         }
         if "gemini-1.5" in model_name or model_name in gemini_advanced_models:
             return GoogleModelFamily.GEMINI_ADVANCED