diff --git a/litellm/router_strategy/auto_router/auto_router.py b/litellm/router_strategy/auto_router/auto_router.py
index 922ffe90239..a980f7f8164 100644
--- a/litellm/router_strategy/auto_router/auto_router.py
+++ b/litellm/router_strategy/auto_router/auto_router.py
@@ -123,7 +123,7 @@ class AutoRouter(CustomLogger):
         raw_content = user_message.get("content", "")
         # Handle Anthropic-style content blocks: [{"type": "text", "text": "..."}]
         if isinstance(raw_content, list):
-            message_content = " ".join(block.get("text", "") for block in raw_content if isinstance(block, dict))
+            message_content = " ".join(block.get("text", "") for block in raw_content if isinstance(block, dict) and block.get("text", ""))
         else:
             message_content = str(raw_content)
         route_choice: Optional[Union[RouteChoice, List[RouteChoice]]] = self.routelayer(text=message_content)
diff --git a/tests/test_litellm/router_strategy/test_auto_router.py b/tests/test_litellm/router_strategy/test_auto_router.py
index c0d7bc0ab46..43786cbd53e 100644
--- a/tests/test_litellm/router_strategy/test_auto_router.py
+++ b/tests/test_litellm/router_strategy/test_auto_router.py
@@ -232,6 +232,6 @@ class TestAutoRouter:
         )
         
         # Assert: only dict blocks contribute; "text" defaults to "" when missing
-        mock_routelayer.assert_called_once_with(text="What is the weather today? In Paris. ")
+        mock_routelayer.assert_called_once_with(text="What is the weather today? In Paris.")
         assert result is not None
         assert result.messages == messages