diff --git a/litellm/router_strategy/complexity_router/complexity_router.py b/litellm/router_strategy/complexity_router/complexity_router.py
index 7d6a8ca6e8a..d37ec116913 100644
--- a/litellm/router_strategy/complexity_router/complexity_router.py
+++ b/litellm/router_strategy/complexity_router/complexity_router.py
@@ -367,12 +367,8 @@ class ComplexityRouter(CustomLogger):
                         call_type = ct
                         break
 
-        # 2. Fall back to data-shape inference
         if call_type is None:
-            if "input" in request_kwargs:
-                call_type = CallTypes.responses
-            else:
-                return None
+            return None
 
         if call_type not in mappings:
             return None