fixed byok models for teams issue (#21408)

tests/proxy_unit_tests/test_proxy_utils.py

@@ -1928,6 +1928,24 @@ def test_get_known_models_from_wildcard(
     assert all(model in wildcard_models for model in expected_models)
 
 
+def test_get_known_models_from_wildcard_without_litellm_params():
+    """
+    Test wildcard expansion without litellm_params (BYOK case - team has openai/*
+    but no deployment in router config).
+    """
+    from litellm.proxy.auth.model_checks import get_known_models_from_wildcard
+
+    wildcard_models = get_known_models_from_wildcard(
+        wildcard_model="openai/*", litellm_params=None
+    )
+    # Should return expanded OpenAI models (gpt-4o, gpt-4o-mini, etc.)
+    assert len(wildcard_models) > 0
+    assert all(m.startswith("openai/") for m in wildcard_models)
+    # Check for common OpenAI models
+    model_ids = [m.split("/", 1)[1] for m in wildcard_models]
+    assert "gpt-4o" in model_ids or "gpt-3.5-turbo" in model_ids
+
+
 @pytest.mark.parametrize(
     "data, user_api_key_dict, expected_model",
     [