diff --git a/backend/internal/handler/admin/admin_basic_handlers_test.go b/backend/internal/handler/admin/admin_basic_handlers_test.go
index 6edf35a3..cc5999a8 100644
--- a/backend/internal/handler/admin/admin_basic_handlers_test.go
+++ b/backend/internal/handler/admin/admin_basic_handlers_test.go
@@ -36,7 +36,6 @@ func setupAdminRouter() (*gin.Engine, *stubAdminService) {
 	router.POST("/api/v1/admin/groups", groupHandler.Create)
 	router.PUT("/api/v1/admin/groups/:id", groupHandler.Update)
 	router.DELETE("/api/v1/admin/groups/:id", groupHandler.Delete)
-	router.GET("/api/v1/admin/groups/:id/stats", groupHandler.GetStats)
 	router.GET("/api/v1/admin/groups/:id/api-keys", groupHandler.GetGroupAPIKeys)
 
 	router.GET("/api/v1/admin/proxies", proxyHandler.List)
@@ -147,7 +146,7 @@ func TestGroupHandlerEndpoints(t *testing.T) {
 	rec = httptest.NewRecorder()
 	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups/2/stats", nil)
 	router.ServeHTTP(rec, req)
-	require.Equal(t, http.StatusOK, rec.Code)
+	require.Equal(t, http.StatusNotFound, rec.Code)
 
 	rec = httptest.NewRecorder()
 	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups/2/api-keys", nil)
@@ -279,6 +278,10 @@ func TestDeprecatedMockAdminEndpointsNotRegistered(t *testing.T) {
 		name string
 		url  string
 	}{
+		{
+			name: "group stats",
+			url:  "/api/v1/admin/groups/2/stats",
+		},
 		{
 			name: "user usage",
 			url:  "/api/v1/admin/users/1/usage?period=today",
diff --git a/backend/internal/handler/admin/group_handler.go b/backend/internal/handler/admin/group_handler.go
index cb2bd201..2284dbfb 100644
--- a/backend/internal/handler/admin/group_handler.go
+++ b/backend/internal/handler/admin/group_handler.go
@@ -341,25 +341,6 @@ func (h *GroupHandler) Delete(c *gin.Context) {
 	response.Success(c, gin.H{"message": "Group deleted successfully"})
 }
 
-// GetStats handles getting group statistics
-// GET /api/v1/admin/groups/:id/stats
-func (h *GroupHandler) GetStats(c *gin.Context) {
-	groupID, err := strconv.ParseInt(c.Param("id"), 10, 64)
-	if err != nil {
-		response.BadRequest(c, "Invalid group ID")
-		return
-	}
-
-	// Return mock data for now
-	response.Success(c, gin.H{
-		"total_api_keys":  0,
-		"active_api_keys": 0,
-		"total_requests":  0,
-		"total_cost":      0.0,
-	})
-	_ = groupID // TODO: implement actual stats
-}
-
 // GetUsageSummary returns today's and cumulative cost for all groups.
 // GET /api/v1/admin/groups/usage-summary?timezone=Asia/Shanghai
 func (h *GroupHandler) GetUsageSummary(c *gin.Context) {
diff --git a/backend/internal/server/routes/admin.go b/backend/internal/server/routes/admin.go
index b80ff5d8..c8c0f4a7 100644
--- a/backend/internal/server/routes/admin.go
+++ b/backend/internal/server/routes/admin.go
@@ -257,7 +257,6 @@ func registerGroupRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		groups.POST("", h.Admin.Group.Create)
 		groups.PUT("/:id", h.Admin.Group.Update)
 		groups.DELETE("/:id", h.Admin.Group.Delete)
-		groups.GET("/:id/stats", h.Admin.Group.GetStats)
 		groups.GET("/:id/rate-multipliers", h.Admin.Group.GetGroupRateMultipliers)
 		groups.PUT("/:id/rate-multipliers", h.Admin.Group.BatchSetGroupRateMultipliers)
 		groups.DELETE("/:id/rate-multipliers", h.Admin.Group.ClearGroupRateMultipliers)
diff --git a/backend/internal/server/routes/admin_routes_test.go b/backend/internal/server/routes/admin_routes_test.go
index e141391a..6df3ac8a 100644
--- a/backend/internal/server/routes/admin_routes_test.go
+++ b/backend/internal/server/routes/admin_routes_test.go
@@ -29,6 +29,7 @@ func TestRegisterAdminRoutes_OmitsDeprecatedMockEndpoints(t *testing.T) {
 
 	deprecatedRoutes := []string{
 		"GET /api/v1/admin/dashboard/realtime",
+		"GET /api/v1/admin/groups/:id/stats",
 		"GET /api/v1/admin/users/:id/usage",
 		"GET /api/v1/admin/proxies/:id/stats",
 		"GET /api/v1/admin/redeem-codes/stats",
diff --git a/frontend/src/api/admin/groups.ts b/frontend/src/api/admin/groups.ts
index 8739d5cb..a4f5d972 100644
--- a/frontend/src/api/admin/groups.ts
+++ b/frontend/src/api/admin/groups.ts
@@ -117,26 +117,6 @@ export async function toggleStatus(id: number, status: 'active' | 'inactive'): P
   return update(id, { status })
 }
 
-/**
- * Get group statistics
- * @param id - Group ID
- * @returns Group usage statistics
- */
-export async function getStats(id: number): Promise<{
-  total_api_keys: number
-  active_api_keys: number
-  total_requests: number
-  total_cost: number
-}> {
-  const { data } = await apiClient.get<{
-    total_api_keys: number
-    active_api_keys: number
-    total_requests: number
-    total_cost: number
-  }>(`/admin/groups/${id}/stats`)
-  return data
-}
-
 /**
  * Get API keys in a group
  * @param id - Group ID
@@ -257,7 +237,6 @@ export const groupsAPI = {
   update,
   delete: deleteGroup,
   toggleStatus,
-  getStats,
   getGroupApiKeys,
   getGroupRateMultipliers,
   clearGroupRateMultipliers,