diff --git a/frontend/src/components/admin/usage/UsageFilters.vue b/frontend/src/components/admin/usage/UsageFilters.vue
index a632a76e..ee5020e7 100644
--- a/frontend/src/components/admin/usage/UsageFilters.vue
+++ b/frontend/src/components/admin/usage/UsageFilters.vue
@@ -139,17 +139,6 @@
           <Select v-model="filters.group_id" :options="groupOptions" searchable @change="emitChange" />
         </div>
 
-        <!-- Date Range Filter -->
-        <div class="w-full sm:w-auto [&_.date-picker-trigger]:w-full">
-          <label class="input-label">{{ t('usage.timeRange') }}</label>
-          <DateRangePicker
-            :start-date="startDate"
-            :end-date="endDate"
-            @update:startDate="updateStartDate"
-            @update:endDate="updateEndDate"
-            @change="emitChange"
-          />
-        </div>
       </div>
 
       <!-- Right: actions -->
@@ -177,7 +166,6 @@ import { ref, onMounted, onUnmounted, toRef, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { adminAPI } from '@/api/admin'
 import Select, { type SelectOption } from '@/components/common/Select.vue'
-import DateRangePicker from '@/components/common/DateRangePicker.vue'
 import type { SimpleApiKey, SimpleUser } from '@/api/admin/usage'
 
 type ModelValue = Record<string, any>
@@ -195,8 +183,6 @@ const props = withDefaults(defineProps<Props>(), {
 })
 const emit = defineEmits([
   'update:modelValue',
-  'update:startDate',
-  'update:endDate',
   'change',
   'refresh',
   'reset',
@@ -248,16 +234,6 @@ const billingTypeOptions = ref<SelectOption[]>([
 
 const emitChange = () => emit('change')
 
-const updateStartDate = (value: string) => {
-  emit('update:startDate', value)
-  filters.value.start_date = value
-}
-
-const updateEndDate = (value: string) => {
-  emit('update:endDate', value)
-  filters.value.end_date = value
-}
-
 const debounceUserSearch = () => {
   if (userSearchTimeout) clearTimeout(userSearchTimeout)
   userSearchTimeout = setTimeout(async () => {
@@ -441,7 +417,11 @@ onMounted(async () => {
     groupOptions.value.push(...gs.items.map((g: any) => ({ value: g.id, label: g.name })))
 
     const uniqueModels = new Set<string>()
-    ms.models?.forEach((s: any) => s.model && uniqueModels.add(s.model))
+    ms.models?.forEach((s: any) => {
+      if (s.model) {
+        uniqueModels.add(s.model)
+      }
+    })
     modelOptions.value.push(
       ...Array.from(uniqueModels)
         .sort()
diff --git a/frontend/src/components/common/DateRangePicker.vue b/frontend/src/components/common/DateRangePicker.vue
index cf5b56fc..b00334a6 100644
--- a/frontend/src/components/common/DateRangePicker.vue
+++ b/frontend/src/components/common/DateRangePicker.vue
@@ -106,7 +106,7 @@ const isOpen = ref(false)
 const containerRef = ref<HTMLElement | null>(null)
 const localStartDate = ref(props.startDate)
 const localEndDate = ref(props.endDate)
-const activePreset = ref<string | null>('7days')
+const activePreset = ref<string | null>('last24Hours')
 
 const today = computed(() => {
   // Use local timezone to avoid UTC timezone issues
@@ -152,6 +152,18 @@ const presets: DatePreset[] = [
       return { start: yesterday, end: yesterday }
     }
   },
+  {
+    labelKey: 'dates.last24Hours',
+    value: 'last24Hours',
+    getRange: () => {
+      const end = new Date()
+      const start = new Date(end.getTime() - 24 * 60 * 60 * 1000)
+      return {
+        start: formatDateToString(start),
+        end: formatDateToString(end)
+      }
+    }
+  },
   {
     labelKey: 'dates.last7Days',
     value: '7days',
diff --git a/frontend/src/components/common/__tests__/DateRangePicker.spec.ts b/frontend/src/components/common/__tests__/DateRangePicker.spec.ts
new file mode 100644
index 00000000..8b155b60
--- /dev/null
+++ b/frontend/src/components/common/__tests__/DateRangePicker.spec.ts
@@ -0,0 +1,96 @@
+import { describe, expect, it, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { ref } from 'vue'
+
+import DateRangePicker from '../DateRangePicker.vue'
+
+const messages: Record<string, string> = {
+  'dates.today': 'Today',
+  'dates.yesterday': 'Yesterday',
+  'dates.last24Hours': 'Last 24 Hours',
+  'dates.last7Days': 'Last 7 Days',
+  'dates.last14Days': 'Last 14 Days',
+  'dates.last30Days': 'Last 30 Days',
+  'dates.thisMonth': 'This Month',
+  'dates.lastMonth': 'Last Month',
+  'dates.startDate': 'Start Date',
+  'dates.endDate': 'End Date',
+  'dates.apply': 'Apply',
+  'dates.selectDateRange': 'Select date range'
+}
+
+vi.mock('vue-i18n', () => ({
+  useI18n: () => ({
+    t: (key: string) => messages[key] ?? key,
+    locale: ref('en')
+  })
+}))
+
+const formatLocalDate = (date: Date): string => {
+  const year = date.getFullYear()
+  const month = String(date.getMonth() + 1).padStart(2, '0')
+  const day = String(date.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+
+describe('DateRangePicker', () => {
+  it('uses last 24 hours as the default recognized preset', () => {
+    const now = new Date()
+    const yesterday = new Date(now.getTime() - 24 * 60 * 60 * 1000)
+
+    const wrapper = mount(DateRangePicker, {
+      props: {
+        startDate: formatLocalDate(yesterday),
+        endDate: formatLocalDate(now)
+      },
+      global: {
+        stubs: {
+          Icon: true
+        }
+      }
+    })
+
+    expect(wrapper.text()).toContain('Last 24 Hours')
+  })
+
+  it('emits range updates with last24Hours preset when applied', async () => {
+    const now = new Date()
+    const today = formatLocalDate(now)
+
+    const wrapper = mount(DateRangePicker, {
+      props: {
+        startDate: today,
+        endDate: today
+      },
+      global: {
+        stubs: {
+          Icon: true
+        }
+      }
+    })
+
+    await wrapper.find('.date-picker-trigger').trigger('click')
+    const presetButton = wrapper.findAll('.date-picker-preset').find((node) =>
+      node.text().includes('Last 24 Hours')
+    )
+    expect(presetButton).toBeDefined()
+
+    await presetButton!.trigger('click')
+    await wrapper.find('.date-picker-apply').trigger('click')
+
+    const nowAfterClick = new Date()
+    const yesterdayAfterClick = new Date(nowAfterClick.getTime() - 24 * 60 * 60 * 1000)
+    const expectedStart = formatLocalDate(yesterdayAfterClick)
+    const expectedEnd = formatLocalDate(nowAfterClick)
+
+    expect(wrapper.emitted('update:startDate')?.[0]).toEqual([expectedStart])
+    expect(wrapper.emitted('update:endDate')?.[0]).toEqual([expectedEnd])
+    expect(wrapper.emitted('change')?.[0]).toEqual([
+      {
+        startDate: expectedStart,
+        endDate: expectedEnd,
+        preset: 'last24Hours'
+      }
+    ])
+  })
+})
diff --git a/frontend/src/i18n/locales/en.ts b/frontend/src/i18n/locales/en.ts
index 6484a27a..01945d4d 100644
--- a/frontend/src/i18n/locales/en.ts
+++ b/frontend/src/i18n/locales/en.ts
@@ -920,6 +920,7 @@ export default {
     lastWeek: 'Last Week',
     thisMonth: 'This Month',
     lastMonth: 'Last Month',
+    last24Hours: 'Last 24 Hours',
     last7Days: 'Last 7 Days',
     last14Days: 'Last 14 Days',
     last30Days: 'Last 30 Days',
diff --git a/frontend/src/i18n/locales/zh.ts b/frontend/src/i18n/locales/zh.ts
index 2f3eb290..6e508a53 100644
--- a/frontend/src/i18n/locales/zh.ts
+++ b/frontend/src/i18n/locales/zh.ts
@@ -925,6 +925,7 @@ export default {
     lastWeek: '上周',
     thisMonth: '本月',
     lastMonth: '上月',
+    last24Hours: '近24小时',
     last7Days: '近 7 天',
     last14Days: '近 14 天',
     last30Days: '近 30 天',
diff --git a/frontend/src/views/admin/UsageView.vue b/frontend/src/views/admin/UsageView.vue
index 92d0938c..2bbc82a7 100644
--- a/frontend/src/views/admin/UsageView.vue
+++ b/frontend/src/views/admin/UsageView.vue
@@ -5,10 +5,20 @@
       <!-- Charts Section -->
       <div class="space-y-4">
         <div class="card p-4">
-          <div class="flex items-center gap-4">
-            <span class="text-sm font-medium text-gray-700 dark:text-gray-300">{{ t('admin.dashboard.granularity') }}:</span>
-            <div class="w-28">
-              <Select v-model="granularity" :options="granularityOptions" @change="loadChartData" />
+          <div class="flex flex-wrap items-center gap-4">
+            <div class="flex items-center gap-2">
+              <span class="text-sm font-medium text-gray-700 dark:text-gray-300">{{ t('admin.dashboard.timeRange') }}:</span>
+              <DateRangePicker
+                v-model:start-date="startDate"
+                v-model:end-date="endDate"
+                @change="onDateRangeChange"
+              />
+            </div>
+            <div class="ml-auto flex items-center gap-2">
+              <span class="text-sm font-medium text-gray-700 dark:text-gray-300">{{ t('admin.dashboard.granularity') }}:</span>
+              <div class="w-28">
+                <Select v-model="granularity" :options="granularityOptions" @change="loadChartData" />
+              </div>
             </div>
           </div>
         </div>
@@ -41,7 +51,7 @@
           <TokenUsageTrend :trend-data="trendData" :loading="chartsLoading" />
         </div>
       </div>
-      <UsageFilters v-model="filters" v-model:startDate="startDate" v-model:endDate="endDate" :exporting="exporting" @change="applyFilters" @refresh="refreshData" @reset="resetFilters" @cleanup="openCleanupDialog" @export="exportToExcel">
+      <UsageFilters v-model="filters" :start-date="startDate" :end-date="endDate" :exporting="exporting" @change="applyFilters" @refresh="refreshData" @reset="resetFilters" @cleanup="openCleanupDialog" @export="exportToExcel">
         <template #after-reset>
           <div class="relative" ref="columnDropdownRef">
             <button
@@ -106,7 +116,7 @@ import { useRoute } from 'vue-router'
 import { useAppStore } from '@/stores/app'; import { adminAPI } from '@/api/admin'; import { adminUsageAPI } from '@/api/admin/usage'
 import { formatReasoningEffort } from '@/utils/format'
 import { resolveUsageRequestType, requestTypeToLegacyStream } from '@/utils/usageRequestType'
-import AppLayout from '@/components/layout/AppLayout.vue'; import Pagination from '@/components/common/Pagination.vue'; import Select from '@/components/common/Select.vue'
+import AppLayout from '@/components/layout/AppLayout.vue'; import Pagination from '@/components/common/Pagination.vue'; import Select from '@/components/common/Select.vue'; import DateRangePicker from '@/components/common/DateRangePicker.vue'
 import UsageStatsCards from '@/components/admin/usage/UsageStatsCards.vue'; import UsageFilters from '@/components/admin/usage/UsageFilters.vue'
 import UsageTable from '@/components/admin/usage/UsageTable.vue'; import UsageExportProgress from '@/components/admin/usage/UsageExportProgress.vue'
 import UsageCleanupDialog from '@/components/admin/usage/UsageCleanupDialog.vue'
@@ -158,9 +168,22 @@ const formatLD = (d: Date) => {
   const day = String(d.getDate()).padStart(2, '0')
   return `${year}-${month}-${day}`
 }
-const getTodayLocalDate = () => formatLD(new Date())
-const getGranularityForRange = (start: string, end: string): 'day' | 'hour' => start === end ? 'hour' : 'day'
-const startDate = ref(getTodayLocalDate()); const endDate = ref(getTodayLocalDate())
+const getLast24HoursRangeDates = (): { start: string; end: string } => {
+  const end = new Date()
+  const start = new Date(end.getTime() - 24 * 60 * 60 * 1000)
+  return {
+    start: formatLD(start),
+    end: formatLD(end)
+  }
+}
+const getGranularityForRange = (start: string, end: string): 'day' | 'hour' => {
+  const startTime = new Date(`${start}T00:00:00`).getTime()
+  const endTime = new Date(`${end}T00:00:00`).getTime()
+  const daysDiff = Math.ceil((endTime - startTime) / (1000 * 60 * 60 * 24))
+  return daysDiff <= 1 ? 'hour' : 'day'
+}
+const defaultRange = getLast24HoursRangeDates()
+const startDate = ref(defaultRange.start); const endDate = ref(defaultRange.end)
 const filters = ref<AdminUsageQueryParams>({ user_id: undefined, model: undefined, group_id: undefined, request_type: undefined, billing_type: null, start_date: startDate.value, end_date: endDate.value })
 const pagination = reactive({ page: 1, page_size: 20, total: 0 })
 
@@ -197,6 +220,18 @@ const applyRouteQueryFilters = () => {
   granularity.value = getGranularityForRange(startDate.value, endDate.value)
 }
 
+const onDateRangeChange = (range: { startDate: string; endDate: string; preset: string | null }) => {
+  startDate.value = range.startDate
+  endDate.value = range.endDate
+  filters.value = {
+    ...filters.value,
+    start_date: range.startDate,
+    end_date: range.endDate
+  }
+  granularity.value = getGranularityForRange(range.startDate, range.endDate)
+  applyFilters()
+}
+
 const loadLogs = async () => {
   abortController?.abort(); const c = new AbortController(); abortController = c; loading.value = true
   try {
@@ -260,7 +295,14 @@ const loadChartData = async () => {
 }
 const applyFilters = () => { pagination.page = 1; loadLogs(); loadStats(); loadChartData() }
 const refreshData = () => { loadLogs(); loadStats(); loadChartData() }
-const resetFilters = () => { startDate.value = getTodayLocalDate(); endDate.value = getTodayLocalDate(); filters.value = { start_date: startDate.value, end_date: endDate.value, request_type: undefined, billing_type: null }; granularity.value = getGranularityForRange(startDate.value, endDate.value); applyFilters() }
+const resetFilters = () => {
+  const range = getLast24HoursRangeDates()
+  startDate.value = range.start
+  endDate.value = range.end
+  filters.value = { start_date: startDate.value, end_date: endDate.value, request_type: undefined, billing_type: null }
+  granularity.value = getGranularityForRange(startDate.value, endDate.value)
+  applyFilters()
+}
 const handlePageChange = (p: number) => { pagination.page = p; loadLogs() }
 const handlePageSizeChange = (s: number) => { pagination.page_size = s; pagination.page = 1; loadLogs() }
 const cancelExport = () => exportAbortController?.abort()
diff --git a/frontend/src/views/admin/__tests__/UsageView.spec.ts b/frontend/src/views/admin/__tests__/UsageView.spec.ts
index 97e9bc19..1a5d285a 100644
--- a/frontend/src/views/admin/__tests__/UsageView.spec.ts
+++ b/frontend/src/views/admin/__tests__/UsageView.spec.ts
@@ -19,11 +19,19 @@ const { list, getStats, getSnapshotV2, getById } = vi.hoisted(() => {
 })
 
 const messages: Record<string, string> = {
+  'admin.dashboard.timeRange': 'Time Range',
   'admin.dashboard.day': 'Day',
   'admin.dashboard.hour': 'Hour',
   'admin.usage.failedToLoadUser': 'Failed to load user',
 }
 
+const formatLocalDate = (date: Date): string => {
+  const year = date.getFullYear()
+  const month = String(date.getMonth() + 1).padStart(2, '0')
+  const day = String(date.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+
 vi.mock('@/api/admin', () => ({
   adminAPI: {
     usage: {
@@ -68,6 +76,12 @@ vi.mock('vue-i18n', async () => {
   }
 })
 
+vi.mock('vue-router', () => ({
+  useRoute: () => ({
+    query: {}
+  })
+}))
+
 const AppLayoutStub = { template: '<div><slot /></div>' }
 const UsageFiltersStub = { template: '<div><slot name="after-reset" /></div>' }
 const ModelDistributionChartStub = {
@@ -138,6 +152,7 @@ describe('admin UsageView distribution metric toggles', () => {
           UserBalanceHistoryModal: true,
           Pagination: true,
           Select: true,
+          DateRangePicker: true,
           Icon: true,
           TokenUsageTrend: true,
           ModelDistributionChart: ModelDistributionChartStub,
@@ -150,6 +165,13 @@ describe('admin UsageView distribution metric toggles', () => {
     await flushPromises()
 
     expect(getSnapshotV2).toHaveBeenCalledTimes(1)
+    const now = new Date()
+    const yesterday = new Date(now.getTime() - 24 * 60 * 60 * 1000)
+    expect(getSnapshotV2).toHaveBeenCalledWith(expect.objectContaining({
+      start_date: formatLocalDate(yesterday),
+      end_date: formatLocalDate(now),
+      granularity: 'hour'
+    }))
 
     const modelChart = wrapper.find('[data-test="model-chart"]')
     const groupChart = wrapper.find('[data-test="group-chart"]')