diff --git a/invokeai/app/services/model_install/model_install_default.py b/invokeai/app/services/model_install/model_install_default.py
index 6a780256ed7..19a8789098b 100644
--- a/invokeai/app/services/model_install/model_install_default.py
+++ b/invokeai/app/services/model_install/model_install_default.py
@@ -38,7 +38,6 @@
     AnyModelConfig,
     CheckpointConfigBase,
     InvalidModelConfigException,
-    ModelConfigBase,
 )
 from invokeai.backend.model_manager.legacy_probe import ModelProbe
 from invokeai.backend.model_manager.metadata import (
@@ -647,10 +646,14 @@ def _probe(self, model_path: Path, config: Optional[ModelRecordChanges] = None):
         hash_algo = self._app_config.hashing_algorithm
         fields = config.model_dump()
 
-        try:
-            return ModelConfigBase.classify(model_path=model_path, hash_algo=hash_algo, **fields)
-        except InvalidModelConfigException:
-            return ModelProbe.probe(model_path=model_path, fields=fields, hash_algo=hash_algo)  # type: ignore
+        return ModelProbe.probe(model_path=model_path, fields=fields, hash_algo=hash_algo)
+
+        # New model probe API is disabled pending resolution of issue caused by a change of the ordering of checks.
+        # See commit message for details.
+        # try:
+        #     return ModelConfigBase.classify(model_path=model_path, hash_algo=hash_algo, **fields)
+        # except InvalidModelConfigException:
+        #     return ModelProbe.probe(model_path=model_path, fields=fields, hash_algo=hash_algo)  # type: ignore
 
     def _register(
         self, model_path: Path, config: Optional[ModelRecordChanges] = None, info: Optional[AnyModelConfig] = None
diff --git a/tests/test_model_probe.py b/tests/test_model_probe.py
index a808b043930..108576716d2 100644
--- a/tests/test_model_probe.py
+++ b/tests/test_model_probe.py
@@ -137,6 +137,7 @@ def test_minimal_working_example(datadir: Path):
     assert config.fun_quote == "Minimal working example of a ModelConfigBase subclass"
 
 
+@pytest.mark.xfail(reason="Known issue with 'helloyoung25d_V15j.safetensors'.", strict=True)
 def test_regression_against_model_probe(datadir: Path, override_model_loading):
     """Verifies results from ModelConfigBase.classify are consistent with those from ModelProbe.probe.
     The test paths are gathered from the 'test_model_probe' directory.
diff --git a/tests/test_model_probe/stripped_models/helloyoung25d_V15j.safetensors b/tests/test_model_probe/stripped_models/helloyoung25d_V15j.safetensors
new file mode 100644
index 00000000000..4ee620fc4d0
--- /dev/null
+++ b/tests/test_model_probe/stripped_models/helloyoung25d_V15j.safetensors
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0f0547f89bdcbb0dfd8b6ff1d8de63336df20107e9a27afc0934e8d3cce584d7
+size 308563