diff --git a/llama_stack/apis/models/models.py b/llama_stack/apis/models/models.py
index d50d5a656..0462a6882 100644
--- a/llama_stack/apis/models/models.py
+++ b/llama_stack/apis/models/models.py
@@ -9,12 +9,12 @@ from typing import Any, Dict, List, Literal, Optional, Protocol, runtime_checkab
 from llama_models.schema_utils import json_schema_type, webmethod
 from pydantic import Field
 
-from llama_stack.apis.resource import Resource
+from llama_stack.apis.resource import Resource, ResourceType
 
 
 @json_schema_type
 class Model(Resource):
-    type: Literal["model"] = "model"
+    type: Literal[ResourceType.model.value] = ResourceType.model.value
     llama_model: str = Field(
         description="Pointer to the underlying core Llama family model. Each model served by Llama Stack must have a core Llama model.",
     )
@@ -33,4 +33,11 @@ class Models(Protocol):
     async def get_model(self, identifier: str) -> Optional[Model]: ...
 
     @webmethod(route="/models/register", method="POST")
-    async def register_model(self, model: Model) -> None: ...
+    async def register_model(
+        self,
+        model_id: str,
+        provider_model_id: Optional[str] = None,
+        provider_id: Optional[str] = None,
+        llama_model: Optional[str] = None,
+        metadata: Optional[Dict[str, Any]] = None,
+    ) -> Model: ...
diff --git a/llama_stack/distribution/routers/routers.py b/llama_stack/distribution/routers/routers.py
index a19495f50..364862271 100644
--- a/llama_stack/distribution/routers/routers.py
+++ b/llama_stack/distribution/routers/routers.py
@@ -4,7 +4,7 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from typing import Any, AsyncGenerator, Dict, List
+from typing import Any, AsyncGenerator, Dict, List, Optional
 
 from llama_stack.apis.datasetio.datasetio import DatasetIO
 from llama_stack.distribution.datatypes import RoutingTable
@@ -71,8 +71,17 @@ class InferenceRouter(Inference):
     async def shutdown(self) -> None:
         pass
 
-    async def register_model(self, model: Model) -> None:
-        await self.routing_table.register_model(model)
+    async def register_model(
+        self,
+        model_id: str,
+        provider_model_id: Optional[str] = None,
+        provider_id: Optional[str] = None,
+        llama_model: Optional[str] = None,
+        metadata: Optional[Dict[str, Any]] = None,
+    ) -> None:
+        await self.routing_table.register_model(
+            model_id, provider_model_id, provider_id, llama_model, metadata
+        )
 
     async def chat_completion(
         self,
diff --git a/llama_stack/distribution/routers/routing_tables.py b/llama_stack/distribution/routers/routing_tables.py
index f28896670..7c231deb5 100644
--- a/llama_stack/distribution/routers/routing_tables.py
+++ b/llama_stack/distribution/routers/routing_tables.py
@@ -202,7 +202,35 @@ class ModelsRoutingTable(CommonRoutingTableImpl, Models):
     async def get_model(self, identifier: str) -> Optional[Model]:
         return await self.get_object_by_identifier(identifier)
 
-    async def register_model(self, model: Model) -> None:
+    async def register_model(
+        self,
+        model_id: str,
+        provider_model_id: Optional[str] = None,
+        provider_id: Optional[str] = None,
+        llama_model: Optional[str] = None,
+        metadata: Optional[Dict[str, Any]] = None,
+    ) -> None:
+        if provider_model_id is None:
+            provider_model_id = model_id
+        if provider_id is None:
+            # If provider_id not specified, use the only provider if it supports this model
+            if len(self.impls_by_provider_id) == 1:
+                provider_id = list(self.impls_by_provider_id.keys())[0]
+            else:
+                raise ValueError(
+                    "No provider specified and multiple providers available. Please specify a provider_id."
+                )
+        if metadata is None:
+            metadata = {}
+        if llama_model is None:
+            llama_model = model_id
+        model = Model(
+            identifier=model_id,
+            provider_resource_id=provider_model_id,
+            provider_id=provider_id,
+            llama_model=llama_model,
+            metadata=metadata,
+        )
         await self.register_object(model)
 
 
diff --git a/llama_stack/providers/tests/inference/fixtures.py b/llama_stack/providers/tests/inference/fixtures.py
index 4ffa31eed..b2c6d3a5e 100644
--- a/llama_stack/providers/tests/inference/fixtures.py
+++ b/llama_stack/providers/tests/inference/fixtures.py
@@ -10,7 +10,6 @@ import pytest
 import pytest_asyncio
 
 from llama_stack.distribution.datatypes import Api, Provider
-from llama_stack.providers.datatypes import Model
 from llama_stack.providers.inline.inference.meta_reference import (
     MetaReferenceInferenceConfig,
 )
@@ -163,11 +162,9 @@ async def inference_stack(request, inference_model):
         inference_fixture.provider_data,
     )
 
-    model = Model(
-        identifier=inference_model,
-        provider_id=inference_fixture.providers[0].provider_id,
+    await impls[Api.models].register_model(
+        model_id=inference_model,
+        provider_model_id=inference_fixture.providers[0].provider_id,
     )
 
-    await impls[Api.models].register_model(model)
-
     return (impls[Api.inference], impls[Api.models])