diff --git a/litellm/proxy/management_endpoints/team_endpoints.py b/litellm/proxy/management_endpoints/team_endpoints.py
index f505406fe0e..8851c26b019 100644
--- a/litellm/proxy/management_endpoints/team_endpoints.py
+++ b/litellm/proxy/management_endpoints/team_endpoints.py
@@ -1822,6 +1822,7 @@ async def new_team(
             "tpm_limit",
             "rpm_limit",
             "team_member_permissions",
+            "access_group_ids",
         ):
             if getattr(data, field, None) is None and (
                 field != "budget_duration" or field not in data.model_fields_set
diff --git a/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py b/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
index 6d31fa3f226..6b56c513c5f 100644
--- a/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
+++ b/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
@@ -51,6 +51,7 @@ from litellm.repositories.config_repository import ConfigRepository
 from litellm.repositories.organization_repository import OrganizationRepository
 from litellm.repositories.prisma_protocols import TableActions
 from litellm.repositories.table_repositories import (
+    AccessGroupRepository,
     SSOConfigRepository,
     UISettingsRepository,
 )
@@ -1169,6 +1170,39 @@ async def update_internal_user_settings(
     )
 
 
+async def _validate_default_access_groups_exist(access_group_ids: list[str]) -> None:
+    """Reject default access groups that cannot be attached.
+
+    Teams are created from these settings long after they are saved, and /team/new does
+    not check that an access group exists, so an unknown id would silently attach nothing
+    to every future team instead of failing here, where the admin can still fix it.
+    """
+    if not access_group_ids:
+        return
+
+    from litellm.proxy.proxy_server import prisma_client
+
+    if prisma_client is None:
+        raise HTTPException(
+            status_code=500,
+            detail={"error": "Database not connected. Please connect a database."},
+        )
+
+    existing_groups: Final = await AccessGroupRepository(prisma_client).table.find_many(
+        where={"access_group_id": {"in": list(dict.fromkeys(access_group_ids))}}
+    )
+    existing_ids: Final = {group.access_group_id for group in existing_groups}
+    missing_ids: Final = tuple(dict.fromkeys(ag_id for ag_id in access_group_ids if ag_id not in existing_ids))
+    if missing_ids:
+        raise HTTPException(
+            status_code=400,
+            detail={
+                "error": f"Access group(s) not found: {', '.join(missing_ids)}. "
+                "Create the access group first or remove it from the default team settings."
+            },
+        )
+
+
 @router.patch(
     "/update/default_team_settings",
     tags=["SSO Settings"],
@@ -1185,6 +1219,8 @@ async def update_default_team_settings(
     """
     if settings.organization_id is not None:
         await _validate_default_organization_exists(settings.organization_id)
+    if settings.access_group_ids is not None:
+        await _validate_default_access_groups_exist(settings.access_group_ids)
 
     return await _update_litellm_setting(
         settings=settings,
diff --git a/litellm/types/proxy/management_endpoints/ui_sso.py b/litellm/types/proxy/management_endpoints/ui_sso.py
index affb6d2e9ce..e7ccb2d4aad 100644
--- a/litellm/types/proxy/management_endpoints/ui_sso.py
+++ b/litellm/types/proxy/management_endpoints/ui_sso.py
@@ -234,3 +234,7 @@ class DefaultTeamSSOParams(LiteLLMPydanticObjectBase):
         default=None,
         description="Default organization for new teams created without an explicit organization",
     )
+    access_group_ids: list[str] | None = Field(
+        default=None,
+        description="Default access groups attached to new teams created without explicit access_group_ids",
+    )
diff --git a/tests/unit/proxy/management_endpoints/test_team_default_params.py b/tests/unit/proxy/management_endpoints/test_team_default_params.py
index cf4961dc82b..8a9030db7f2 100644
--- a/tests/unit/proxy/management_endpoints/test_team_default_params.py
+++ b/tests/unit/proxy/management_endpoints/test_team_default_params.py
@@ -214,6 +214,40 @@ class TestNewTeamDefaultParamsApplied:
         assert data.rpm_limit == 500
         assert data.team_member_permissions == ["/key/generate", "/key/update"]
 
+    @pytest.mark.asyncio
+    async def test_default_access_group_ids_attach_to_a_team_created_without_any(self, monkeypatch):
+        """A central access group configured in default_team_params lands on every
+        /team/new call that omits access_group_ids, not only on SSO-created teams."""
+        from litellm.proxy.management_endpoints.team_endpoints import new_team
+
+        monkeypatch.setattr(litellm, "default_team_params", {"access_group_ids": ["central-models"]})
+
+        data = NewTeamRequest(team_alias="my-team")
+
+        try:
+            await new_team(data=data, user_api_key_dict=self._make_admin_auth(), http_request=MagicMock())
+        except Exception:
+            pass
+
+        assert data.access_group_ids == ["central-models"]
+
+    @pytest.mark.asyncio
+    @pytest.mark.parametrize("explicit_access_group_ids", [["research"], []])
+    async def test_explicit_access_group_ids_win_over_the_default(self, monkeypatch, explicit_access_group_ids):
+        """An explicit list, including an empty one, is the caller's choice and is kept."""
+        from litellm.proxy.management_endpoints.team_endpoints import new_team
+
+        monkeypatch.setattr(litellm, "default_team_params", {"access_group_ids": ["central-models"]})
+
+        data = NewTeamRequest(team_alias="my-team", access_group_ids=explicit_access_group_ids)
+
+        try:
+            await new_team(data=data, user_api_key_dict=self._make_admin_auth(), http_request=MagicMock())
+        except Exception:
+            pass
+
+        assert data.access_group_ids == explicit_access_group_ids
+
     @pytest.mark.asyncio
     async def test_explicit_values_not_overridden(self, monkeypatch):
         """When request provides explicit values, defaults do not override them."""
diff --git a/tests/unit/proxy/management_endpoints/test_ui_sso.py b/tests/unit/proxy/management_endpoints/test_ui_sso.py
index ba78fefd653..59179d50b79 100644
--- a/tests/unit/proxy/management_endpoints/test_ui_sso.py
+++ b/tests/unit/proxy/management_endpoints/test_ui_sso.py
@@ -727,10 +727,15 @@ def test_get_group_ids_from_graph_api_response():
     [
         # Test case 1: Using DefaultTeamSSOParams
         DefaultTeamSSOParams(
-            max_budget=10, budget_duration="1d", models=["special-gpt-5"]
+            max_budget=10, budget_duration="1d", models=["special-gpt-5"], access_group_ids=["central-models"]
         ),
         # Test case 2: Using Dict
-        {"max_budget": 10, "budget_duration": "1d", "models": ["special-gpt-5"]},
+        {
+            "max_budget": 10,
+            "budget_duration": "1d",
+            "models": ["special-gpt-5"],
+            "access_group_ids": ["central-models"],
+        },
     ],
 )
 async def test_default_team_params(team_params):
@@ -775,6 +780,7 @@ async def test_default_team_params(team_params):
         assert create_call_args["max_budget"] == 10
         assert create_call_args["budget_duration"] == "1d"
         assert create_call_args["models"] == ["special-gpt-5"]
+        assert create_call_args["access_group_ids"] == ["central-models"]
 
 
 @pytest.mark.asyncio
diff --git a/tests/unit/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py b/tests/unit/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py
index e66050877df..59c88fb3979 100644
--- a/tests/unit/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py
+++ b/tests/unit/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py
@@ -3458,6 +3458,86 @@ def test_update_default_team_settings_without_organization_skips_lookup(
     assert mock_proxy_config["save_call_count"]() == 1
 
 
+@pytest.fixture
+def mock_access_group_lookup(monkeypatch):
+    """Fake the access group table so the default team settings endpoint can check ids."""
+    from unittest.mock import AsyncMock, MagicMock
+
+    import litellm
+    import litellm.proxy.proxy_server as proxy_server_module
+
+    existing_access_group_ids: set = set()
+
+    async def _find_many(where):
+        return [
+            MagicMock(access_group_id=access_group_id)
+            for access_group_id in where["access_group_id"]["in"]
+            if access_group_id in existing_access_group_ids
+        ]
+
+    find_many = AsyncMock(side_effect=_find_many)
+    fake_prisma = MagicMock()
+    fake_prisma.db.litellm_accessgrouptable.find_many = find_many
+
+    monkeypatch.setattr(proxy_server_module, "prisma_client", fake_prisma)
+    monkeypatch.setattr("litellm.proxy.proxy_server.store_model_in_db", True)
+    monkeypatch.setattr(litellm, "default_team_params", {})
+
+    return {"existing_access_group_ids": existing_access_group_ids, "find_many": find_many}
+
+
+def test_update_default_team_settings_rejects_unknown_access_group(mock_proxy_config, mock_auth, mock_access_group_lookup):
+    """/team/new never checks that an access group exists, so an unknown default id
+    would silently attach nothing to every future team. Catch it where the admin typed it."""
+    mock_access_group_lookup["existing_access_group_ids"].add("real-group")
+
+    resp = client.patch(
+        "/update/default_team_settings",
+        json={"access_group_ids": ["real-group", "ghost-group"]},
+    )
+
+    assert resp.status_code == 400, resp.text
+    assert "ghost-group" in resp.json()["detail"]["error"]
+    assert "real-group" not in resp.json()["detail"]["error"]
+    assert mock_proxy_config["save_call_count"]() == 0
+
+    import litellm
+
+    assert litellm.default_team_params == {}
+
+
+def test_update_default_team_settings_saves_existing_access_groups(mock_proxy_config, mock_auth, mock_access_group_lookup):
+    """Real access group ids save and reach the in-memory settings /team/new reads."""
+    mock_access_group_lookup["existing_access_group_ids"].update({"real-group", "other-group"})
+
+    resp = client.patch(
+        "/update/default_team_settings",
+        json={"access_group_ids": ["real-group", "other-group"]},
+    )
+
+    assert resp.status_code == 200, resp.text
+    assert resp.json()["settings"]["access_group_ids"] == ["real-group", "other-group"]
+    assert mock_proxy_config["save_call_count"]() == 1
+
+    import litellm
+
+    assert litellm.default_team_params["access_group_ids"] == ["real-group", "other-group"]
+
+
+def test_update_default_team_settings_with_empty_access_groups_skips_lookup(
+    mock_proxy_config, mock_auth, mock_access_group_lookup
+):
+    """Clearing the default access groups must not pay for a DB round trip."""
+    resp = client.patch(
+        "/update/default_team_settings",
+        json={"access_group_ids": []},
+    )
+
+    assert resp.status_code == 200, resp.text
+    mock_access_group_lookup["find_many"].assert_not_awaited()
+    assert mock_proxy_config["save_call_count"]() == 1
+
+
 def test_update_mcp_semantic_filter_settings_requires_proxy_admin(monkeypatch):
     """Non-admin callers must not mutate global MCP semantic filter settings."""
     from litellm.proxy._types import UserAPIKeyAuth
diff --git a/ui/litellm-dashboard/src/components/TeamSSOSettings.test.tsx b/ui/litellm-dashboard/src/components/TeamSSOSettings.test.tsx
index 4a042c32cda..5a4ce705b82 100644
--- a/ui/litellm-dashboard/src/components/TeamSSOSettings.test.tsx
+++ b/ui/litellm-dashboard/src/components/TeamSSOSettings.test.tsx
@@ -89,6 +89,32 @@ vi.mock("./common_components/OrganizationDropdown", () => ({
   ),
 }));
 
+vi.mock("@/app/(dashboard)/hooks/accessGroups/useAccessGroups", () => ({
+  useAccessGroups: () => ({
+    data: [
+      { access_group_id: "ag-1", access_group_name: "Central Models" },
+      { access_group_id: "ag-2", access_group_name: "Research" },
+    ],
+    isLoading: false,
+    isError: false,
+  }),
+}));
+
+vi.mock("./common_components/AccessGroupSelector", () => ({
+  default: ({ value = [], onChange }: { value?: string[]; onChange?: (v: string[]) => void }) => (
+    <select
+      data-testid="access-group-selector"
+      multiple
+      value={value}
+      onChange={(e) => onChange?.(Array.from(e.target.selectedOptions, (option) => option.value))}
+      aria-label="Access Groups"
+    >
+      <option value="ag-1">Central Models</option>
+      <option value="ag-2">Research</option>
+    </select>
+  ),
+}));
+
 vi.mock("./ModelSelect/ModelSelect", () => {
   const ModelSelect = ({ value, onChange }: { value: string[]; onChange: (value: string[]) => void }) => (
     <select
@@ -134,6 +160,7 @@ describe("TeamSSOSettings", () => {
       rpm_limit: 100,
       models: ["gpt-4"],
       team_member_permissions: ["/key/generate", "/key/update"],
+      access_group_ids: ["ag-1"],
     },
   };
 
@@ -247,6 +274,47 @@ describe("TeamSSOSettings", () => {
     });
   });
 
+  it("should display default access groups by name in view mode", async () => {
+    mockGetDefaultTeamSettings.mockResolvedValue({
+      values: { ...mockSettingsResponse.values, access_group_ids: ["ag-1", "ag-missing"] },
+    });
+
+    renderWithProviders(<TeamSSOSettings {...defaultProps} />);
+
+    expect(await screen.findByText("Central Models")).toBeInTheDocument();
+    expect(screen.getByText("ag-missing")).toBeInTheDocument();
+  });
+
+  it("should say the models default only applies to SSO auto-created teams", async () => {
+    mockGetDefaultTeamSettings.mockResolvedValue(mockSettingsResponse);
+
+    renderWithProviders(<TeamSSOSettings {...defaultProps} />);
+
+    expect(await screen.findByText(/auto-created from SSO groups/i)).toBeInTheDocument();
+  });
+
+  it("should send the newly selected access group alongside the existing one when saving", async () => {
+    mockGetDefaultTeamSettings.mockResolvedValue(mockSettingsResponse);
+    mockUpdateDefaultTeamSettings.mockResolvedValue({
+      settings: { ...mockSettingsResponse.values, access_group_ids: ["ag-1", "ag-2"] },
+    });
+
+    renderWithProviders(<TeamSSOSettings {...defaultProps} />);
+
+    await userEvent.click(await screen.findByRole("button", { name: /Edit Settings/i }));
+    await userEvent.selectOptions(screen.getByTestId("access-group-selector"), "ag-2");
+    await userEvent.click(screen.getByRole("button", { name: /Save Changes/i }));
+
+    await waitFor(() => {
+      expect(mockUpdateDefaultTeamSettings).toHaveBeenCalledWith(
+        "test-token",
+        expect.objectContaining({ access_group_ids: ["ag-1", "ag-2"] }),
+      );
+    });
+
+    expect(await screen.findByText("Research")).toBeInTheDocument();
+  });
+
   it("should display permissions as tags in view mode", async () => {
     mockGetDefaultTeamSettings.mockResolvedValue(mockSettingsResponse);
 
diff --git a/ui/litellm-dashboard/src/components/TeamSSOSettings.tsx b/ui/litellm-dashboard/src/components/TeamSSOSettings.tsx
index ed53a54022f..c1e67d8cbf7 100644
--- a/ui/litellm-dashboard/src/components/TeamSSOSettings.tsx
+++ b/ui/litellm-dashboard/src/components/TeamSSOSettings.tsx
@@ -1,6 +1,7 @@
 import { Edit, Save } from "lucide-react";
 import React, { useEffect, useState } from "react";
 
+import { useAccessGroups } from "@/app/(dashboard)/hooks/accessGroups/useAccessGroups";
 import { useOrganizations } from "@/app/(dashboard)/hooks/organizations/useOrganizations";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
@@ -25,6 +26,7 @@ import BudgetDurationDropdown, { getBudgetDurationLabel } from "./common_compone
 import { getModelDisplayName } from "./key_team_helpers/fetch_available_models_team_key";
 import { toast } from "@/lib/toast";
 import { ModelSelect } from "./ModelSelect/ModelSelect";
+import AccessGroupSelector from "./common_components/AccessGroupSelector";
 import OrganizationDropdown from "./common_components/OrganizationDropdown";
 
 interface TeamSSOSettingsProps {
@@ -98,6 +100,7 @@ interface SettingsValues {
   models: string[];
   team_member_permissions: string[];
   organization_id: string | null;
+  access_group_ids: string[];
 }
 
 const DEFAULT_VALUES: SettingsValues = {
@@ -108,6 +111,7 @@ const DEFAULT_VALUES: SettingsValues = {
   models: [],
   team_member_permissions: [],
   organization_id: null,
+  access_group_ids: [],
 };
 
 const TeamSSOSettings: React.FC<TeamSSOSettingsProps> = ({ accessToken }) => {
@@ -119,6 +123,9 @@ const TeamSSOSettings: React.FC<TeamSSOSettingsProps> = ({ accessToken }) => {
   const [saving, setSaving] = useState<boolean>(false);
   const [fetchError, setFetchError] = useState<boolean>(false);
   const { data: organizations, isLoading: isOrganizationsLoading } = useOrganizations();
+  const { data: accessGroups } = useAccessGroups();
+  const getAccessGroupLabel = (accessGroupId: string): string =>
+    accessGroups?.find((group) => group.access_group_id === accessGroupId)?.access_group_name ?? accessGroupId;
 
   useEffect(() => {
     const fetchSettings = async () => {
@@ -345,9 +352,25 @@ const TeamSSOSettings: React.FC<TeamSSOSettingsProps> = ({ accessToken }) => {
               }
             />
 
+            <SettingRow
+              label="Access Groups"
+              description="Access groups attached to teams created without explicit access groups. Use this to manage model access for all new teams in one place."
+              isEditing={isEditing}
+              viewContent={renderTags(values.access_group_ids, getAccessGroupLabel)}
+              editContent={
+                <div className="*:w-full">
+                  <AccessGroupSelector
+                    value={editedValues.access_group_ids || []}
+                    onChange={(v) => update("access_group_ids", v)}
+                    placeholder="Select access groups"
+                  />
+                </div>
+              }
+            />
+
             <SettingRow
               label="Models"
-              description="Default list of models that new teams can access."
+              description="Default list of models for teams auto-created from SSO groups. Teams created from the UI or /team/new are not affected."
               isEditing={isEditing}
               viewContent={renderTags(values.models, getModelDisplayName)}
               editContent={
diff --git a/ui/litellm-dashboard/src/lib/http/schema.d.ts b/ui/litellm-dashboard/src/lib/http/schema.d.ts
index 66fe9b17a82..240a9ab5918 100644
--- a/ui/litellm-dashboard/src/lib/http/schema.d.ts
+++ b/ui/litellm-dashboard/src/lib/http/schema.d.ts
@@ -32119,6 +32119,11 @@ export interface components {
          *     `models` is the exception: it only applies to teams automatically created by LiteLLM via SSO Groups.
          */
         DefaultTeamSSOParams: {
+            /**
+             * Access Group Ids
+             * @description Default access groups attached to new teams created without explicit access_group_ids
+             */
+            access_group_ids?: string[] | null;
             /**
              * Budget Duration
              * @description Default budget duration for new teams, when not explicitly provided (e.g. '24h', '7d', '30d')