diff --git a/api/controllers/inner_api/__init__.py b/api/controllers/inner_api/__init__.py
index f47861cf274..986ebd29738 100644
--- a/api/controllers/inner_api/__init__.py
+++ b/api/controllers/inner_api/__init__.py
@@ -23,6 +23,7 @@ from .knowledge import retrieval as _knowledge_retrieval
 from .plugin import agent_config as _agent_config
 from .plugin import agent_drive as _agent_drive
 from .plugin import plugin as _plugin
+from .workspace import plugin_model_providers as _plugin_model_providers
 from .workspace import workspace as _workspace
 
 api.add_namespace(inner_api_ns)
@@ -35,6 +36,7 @@ __all__ = [
     "_knowledge_retrieval",
     "_mail",
     "_plugin",
+    "_plugin_model_providers",
     "_runtime_credentials",
     "_workspace",
     "api",
diff --git a/api/controllers/inner_api/workspace/plugin_model_providers.py b/api/controllers/inner_api/workspace/plugin_model_providers.py
new file mode 100644
index 00000000000..50008a5bd82
--- /dev/null
+++ b/api/controllers/inner_api/workspace/plugin_model_providers.py
@@ -0,0 +1,39 @@
+from flask_restx import Resource
+from pydantic import BaseModel, ConfigDict, Field
+
+from controllers.common.schema import register_schema_model
+from controllers.console.wraps import setup_required
+from controllers.inner_api import inner_api_ns
+from controllers.inner_api.wraps import enterprise_inner_api_only
+from core.plugin.plugin_service import PluginService
+
+
+class InvalidatePluginModelProvidersCachePayload(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    tenant_ids: list[str] = Field(default_factory=list, description="Workspace ids whose cache should be invalidated")
+
+
+register_schema_model(inner_api_ns, InvalidatePluginModelProvidersCachePayload)
+
+
+@inner_api_ns.route("/enterprise/workspace/plugin-model-providers/invalidate")
+class EnterprisePluginModelProvidersCacheInvalidate(Resource):
+    @setup_required
+    @enterprise_inner_api_only
+    @inner_api_ns.doc(
+        "enterprise_invalidate_plugin_model_providers_cache",
+        responses={
+            200: "Cache invalidated",
+            400: "Invalid request",
+            401: "Unauthorized - invalid API key",
+        },
+    )
+    @inner_api_ns.expect(inner_api_ns.models[InvalidatePluginModelProvidersCachePayload.__name__])
+    def post(self):
+        args = InvalidatePluginModelProvidersCachePayload.model_validate(inner_api_ns.payload or {})
+
+        for tenant_id in args.tenant_ids:
+            PluginService.invalidate_plugin_model_providers_cache(tenant_id)
+
+        return {"result": "success"}, 200
diff --git a/api/tests/unit_tests/controllers/inner_api/workspace/test_plugin_model_providers.py b/api/tests/unit_tests/controllers/inner_api/workspace/test_plugin_model_providers.py
new file mode 100644
index 00000000000..25902117ce5
--- /dev/null
+++ b/api/tests/unit_tests/controllers/inner_api/workspace/test_plugin_model_providers.py
@@ -0,0 +1,64 @@
+import inspect
+from unittest.mock import call, patch
+
+import pytest
+from flask import Flask
+from pydantic import ValidationError
+
+from controllers.inner_api.workspace.plugin_model_providers import (
+    EnterprisePluginModelProvidersCacheInvalidate,
+    InvalidatePluginModelProvidersCachePayload,
+)
+
+
+class TestInvalidatePluginModelProvidersCachePayload:
+    def test_valid_payload(self):
+        payload = InvalidatePluginModelProvidersCachePayload.model_validate(
+            {"tenant_ids": ["tenant-alpha", "tenant-beta"]}
+        )
+        assert payload.tenant_ids == ["tenant-alpha", "tenant-beta"]
+
+    def test_missing_tenant_ids_defaults_to_empty(self):
+        payload = InvalidatePluginModelProvidersCachePayload.model_validate({})
+        assert payload.tenant_ids == []
+
+    def test_unknown_field_rejected(self):
+        with pytest.raises(ValidationError):
+            InvalidatePluginModelProvidersCachePayload.model_validate({"tenant_ids": ["tenant-alpha"], "generation": 7})
+
+
+class TestEnterprisePluginModelProvidersCacheInvalidate:
+    @pytest.fixture
+    def api_instance(self):
+        return EnterprisePluginModelProvidersCacheInvalidate()
+
+    def _post(self, api_instance, app: Flask, payload):
+        unwrapped_post = inspect.unwrap(api_instance.post)
+        with app.test_request_context():
+            with patch("controllers.inner_api.workspace.plugin_model_providers.inner_api_ns") as mock_ns:
+                mock_ns.payload = payload
+                return unwrapped_post(api_instance)
+
+    @patch("controllers.inner_api.workspace.plugin_model_providers.PluginService")
+    def test_post_invalidates_once_per_tenant(self, mock_plugin_service, api_instance, app: Flask):
+        result = self._post(api_instance, app, {"tenant_ids": ["tenant-alpha", "tenant-beta"]})
+
+        assert result == ({"result": "success"}, 200)
+        assert mock_plugin_service.invalidate_plugin_model_providers_cache.call_args_list == [
+            call("tenant-alpha"),
+            call("tenant-beta"),
+        ]
+
+    @patch("controllers.inner_api.workspace.plugin_model_providers.PluginService")
+    def test_post_with_empty_list_is_a_no_op(self, mock_plugin_service, api_instance, app: Flask):
+        result = self._post(api_instance, app, {"tenant_ids": []})
+
+        assert result == ({"result": "success"}, 200)
+        mock_plugin_service.invalidate_plugin_model_providers_cache.assert_not_called()
+
+    @patch("controllers.inner_api.workspace.plugin_model_providers.PluginService")
+    def test_post_with_missing_payload_is_a_no_op(self, mock_plugin_service, api_instance, app: Flask):
+        result = self._post(api_instance, app, None)
+
+        assert result == ({"result": "success"}, 200)
+        mock_plugin_service.invalidate_plugin_model_providers_cache.assert_not_called()