diff --git a/python/sglang/srt/models/registry.py b/python/sglang/srt/models/registry.py
index 76e042a95..5e2a3c67e 100644
--- a/python/sglang/srt/models/registry.py
+++ b/python/sglang/srt/models/registry.py
@@ -17,6 +17,18 @@ class _ModelRegistry:
     # Keyed by model_arch
     models: Dict[str, Union[Type[nn.Module], str]] = field(default_factory=dict)
 
+    def register(self, package_name: str, overwrite: bool = False):
+        new_models = import_model_classes(package_name)
+        if overwrite:
+            self.models.update(new_models)
+        else:
+            for arch, cls in new_models.items():
+                if arch in self.models:
+                    raise ValueError(
+                        f"Model architecture {arch} already registered. Set overwrite=True to replace."
+                    )
+                self.models[arch] = cls
+
     def get_supported_archs(self) -> AbstractSet[str]:
         return self.models.keys()
 
@@ -74,9 +86,8 @@ class _ModelRegistry:
 
 
 @lru_cache()
-def import_model_classes():
+def import_model_classes(package_name: str):
     model_arch_name_to_cls = {}
-    package_name = "sglang.srt.models"
     package = importlib.import_module(package_name)
     for _, name, ispkg in pkgutil.iter_modules(package.__path__, package_name + "."):
         if not ispkg:
@@ -104,4 +115,5 @@ def import_model_classes():
     return model_arch_name_to_cls
 
 
-ModelRegistry = _ModelRegistry(import_model_classes())
+ModelRegistry = _ModelRegistry()
+ModelRegistry.register("sglang.srt.models")