diff --git a/litellm/proxy/pass_through_endpoints/llm_provider_handlers/typesafe_passthrough_logging_handler.py b/litellm/proxy/pass_through_endpoints/llm_provider_handlers/typesafe_passthrough_logging_handler.py
index cb6e72c6e3c..9b196660c2c 100644
--- a/litellm/proxy/pass_through_endpoints/llm_provider_handlers/typesafe_passthrough_logging_handler.py
+++ b/litellm/proxy/pass_through_endpoints/llm_provider_handlers/typesafe_passthrough_logging_handler.py
@@ -71,7 +71,7 @@ class TypeSafePassthroughLoggingHandler:
         response_model: Final = response.model
         request_model_value: Final = request_body.get("model")
         request_model: Final = request_model_value if isinstance(request_model_value, str) else None
-        logged_model: Final = response_model or request_model or "jev-latest"
+        logged_model: Final = response_model or request_model or "unknown"
         model_name: Final = f"typesafe/{logged_model}"
         usage: Final = response.usage or _TypeSafeUsage()
         input_tokens: Final = usage.input_tokens
diff --git a/tests/test_litellm/proxy/pass_through_endpoints/llm_provider_handlers/test_typesafe_passthrough_logging_handler.py b/tests/test_litellm/proxy/pass_through_endpoints/llm_provider_handlers/test_typesafe_passthrough_logging_handler.py
index 326b86654fe..345eeeedc31 100644
--- a/tests/test_litellm/proxy/pass_through_endpoints/llm_provider_handlers/test_typesafe_passthrough_logging_handler.py
+++ b/tests/test_litellm/proxy/pass_through_endpoints/llm_provider_handlers/test_typesafe_passthrough_logging_handler.py
@@ -80,6 +80,13 @@ def test_falls_back_to_request_model_when_response_model_is_missing():
     assert result["kwargs"]["response_cost"] == pytest.approx(expected_cost)
 
 
+def test_call_naming_no_model_is_logged_as_unknown_and_never_priced_as_a_registry_model():
+    result = _handler_result({"usage": {"input_tokens": 10, "output_tokens": 2}}, {})
+
+    assert result["kwargs"]["model"] == "typesafe/unknown"
+    assert result["kwargs"]["response_cost"] == 0.0
+
+
 def test_missing_usage_is_zero_cost():
     result = _handler_result({"model": "jev-1.13.0"}, {"model": "jev-latest"})