diff --git a/litellm/proxy/auth/model_checks.py b/litellm/proxy/auth/model_checks.py
index 1625198892f..bfbf1e4dba1 100644
--- a/litellm/proxy/auth/model_checks.py
+++ b/litellm/proxy/auth/model_checks.py
@@ -120,7 +120,11 @@ def get_key_models(
                 if include_model_access_groups:
                     all_models.extend(model_access_groups.keys())
         if SpecialModelNames.all_proxy_models.value in all_models:
-            all_models = list(proxy_model_list)  # copy to avoid mutating caller's list
+            # Union team-specific models with proxy-wide list, matching get_team_models()
+            # which uses set.update(). Replacing discards team-specific models.
+            merged = set(all_models) | set(proxy_model_list)
+            merged.discard(SpecialModelNames.all_proxy_models.value)
+            all_models = list(merged)
             if include_model_access_groups:
                 all_models.extend(model_access_groups.keys())