From 73eefc89b9546904c86444218257d9417583faa8 Mon Sep 17 00:00:00 2001 From: S0ngRu1 <1922909737@qq.com> Date: Sat, 9 May 2026 17:08:55 +0800 Subject: [PATCH] fix(router): register model info under responses/-stripped variant - _create_deployment: register shared model_info under stripped backend key when litellm_params.model contains responses/ (matches post-bridge lookup names). - add_deployment: mirror OLD MODEL REGISTRATION + stripped alias inside model_id block so runtime-loaded deployments match YAML bootstrap. - Tests for model_list init and add_deployment paths. Co-authored-by: Cursor --- litellm/router.py | 44 ++++++++++---- .../test_router_model_cost_isolation.py | 57 +++++++++++++++++++ 2 files changed, 91 insertions(+), 10 deletions(-) diff --git a/litellm/router.py b/litellm/router.py index 7512ee387dca..37295f1a7d2d 100644 --- a/litellm/router.py +++ b/litellm/router.py @@ -7076,11 +7076,11 @@ def _create_deployment( _shared_model_info = { k: v for k, v in _model_info.items() if k not in _custom_pricing_fields } - litellm.register_model( - model_cost={ - _model_name: _shared_model_info, - } - ) + _backend_alias_cost = {_model_name: _shared_model_info} + if "responses/" in _model_name: + _stripped_model_name = _model_name.replace("responses/", "") + _backend_alias_cost[_stripped_model_name] = _shared_model_info + litellm.register_model(model_cost=_backend_alias_cost) ## Check if LLM Deployment is allowed for this deployment if ( @@ -7752,6 +7752,12 @@ def add_deployment(self, deployment: Deployment) -> Optional[Deployment]: # initialize client self._add_deployment(deployment=deployment) + _model_info_dict: dict = deployment.model_info.model_dump(exclude_none=True) + for field in CustomPricingLiteLLMParams.model_fields.keys(): + field_value = deployment.litellm_params.get(field) + if field_value is not None: + _model_info_dict[field] = field_value + # Register custom pricing in litellm.model_cost. # Mirrors _create_deployment() logic to ensure dynamically-added deployments # (e.g., loaded from DB) also have their custom pricing registered. @@ -7759,13 +7765,31 @@ def add_deployment(self, deployment: Deployment) -> Optional[Deployment]: # zero-cost models, causing budget checks to block free models. _model_id = deployment.model_info.id if _model_id is not None: - _model_info_dict: dict = deployment.model_info.model_dump(exclude_none=True) - for field in CustomPricingLiteLLMParams.model_fields.keys(): - field_value = deployment.litellm_params.get(field) - if field_value is not None: - _model_info_dict[field] = field_value litellm.register_model(model_cost={_model_id: _model_info_dict}) + ## REGISTER MODEL INFO IN LITELLM MODEL COST MAP + ## OLD MODEL REGISTRATION ## Kept to prevent breaking changes + _model_name = deployment.litellm_params.model + if deployment.litellm_params.custom_llm_provider is not None: + _model_name = ( + deployment.litellm_params.custom_llm_provider + "/" + _model_name + ) + + # For the shared backend key, strip custom pricing fields so that + # one deployment's pricing overrides don't pollute another + # deployment sharing the same backend model name. + # Each deployment's full pricing is already stored under its + # unique model_id above (when present). + _custom_pricing_fields = CustomPricingLiteLLMParams.model_fields.keys() + _shared_model_info = { + k: v for k, v in _model_info_dict.items() if k not in _custom_pricing_fields + } + _backend_alias_cost = {_model_name: _shared_model_info} + if "responses/" in _model_name: + _stripped_model_name = _model_name.replace("responses/", "") + _backend_alias_cost[_stripped_model_name] = _shared_model_info + litellm.register_model(model_cost=_backend_alias_cost) + # add to model names self._add_model_to_list_and_index_map( model=_deployment, model_id=deployment.model_info.id diff --git a/tests/test_litellm/test_router_model_cost_isolation.py b/tests/test_litellm/test_router_model_cost_isolation.py index 7a9d5acaa27b..c3f930785572 100644 --- a/tests/test_litellm/test_router_model_cost_isolation.py +++ b/tests/test_litellm/test_router_model_cost_isolation.py @@ -18,6 +18,7 @@ import litellm from litellm import Router +from litellm.types.router import Deployment, LiteLLM_Params, ModelInfo def test_should_not_pollute_shared_key_with_zero_cost_pricing(): @@ -266,3 +267,59 @@ def test_should_preserve_builtin_pricing_regardless_of_deployment_order(): f"Order should not matter. Expected {builtin_output_cost}, " f"got {info_std_2['output_cost_per_token']}" ) + + +def test_responses_prefix_stripped_alias_registered_for_model_list(): + """ + Register ``litellm.model_cost`` under the backend key with ``responses/`` and + under the stripped key (``responses_api_bridge_check`` removes that segment). + """ + uid = "responses-strip-alias-test-a1b2c3d4" + Router( + model_list=[ + { + "model_name": "azure-responses-strip-test", + "litellm_params": { + "model": "responses/gpt-strip-test-a1b2c3d4", + "custom_llm_provider": "azure", + "api_key": "fake-key-strip", + }, + "model_info": { + "id": uid, + "supports_native_streaming": True, + }, + } + ], + ) + assert "azure/responses/gpt-strip-test-a1b2c3d4" in litellm.model_cost + assert "azure/gpt-strip-test-a1b2c3d4" in litellm.model_cost + assert ( + litellm.model_cost["azure/gpt-strip-test-a1b2c3d4"].get( + "supports_native_streaming" + ) + is True + ) + + +def test_responses_prefix_stripped_alias_registered_for_add_deployment(): + """Dynamic ``add_deployment`` must mirror ``_create_deployment`` registration.""" + uid = "add-dep-responses-strip-e5f6a7b8" + router = Router(model_list=[]) + deployment = Deployment( + model_name="dyn-responses-strip", + litellm_params=LiteLLM_Params( + model="responses/gpt-add-strip-e5f6a7b8", + custom_llm_provider="azure", + api_key="fake-key-add", + ), + model_info=ModelInfo(id=uid, supports_native_streaming=True), + ) + router.add_deployment(deployment=deployment) + assert "azure/responses/gpt-add-strip-e5f6a7b8" in litellm.model_cost + assert "azure/gpt-add-strip-e5f6a7b8" in litellm.model_cost + assert ( + litellm.model_cost["azure/gpt-add-strip-e5f6a7b8"].get( + "supports_native_streaming" + ) + is True + )