diff --git a/app/detail/[...slug]/page.tsx b/app/detail/[...slug]/page.tsx
index 35164b9..1fd821b 100644
--- a/app/detail/[...slug]/page.tsx
+++ b/app/detail/[...slug]/page.tsx
@@ -10,6 +10,7 @@ import { TimeRangeSelector } from "@/components/TimeRangeSelector";
 import { TrendChart } from "@/components/charts/TrendChart";
 import { buildQuery, formatNumber, formatTokens, formatUSD } from "@/lib/utils";
 import { sortDetailBreakdown, type DetailBreakdownItem, type DetailBreakdownSortKey } from "@/lib/detail-sort";
+import { getDetailStats, type DetailStatKey } from "@/lib/detail-stats";
 import { useTimeRange } from "@/lib/time-range-context";
 import { useI18n } from "@/lib/i18n";
 
@@ -79,6 +80,16 @@ export default function DetailPage() {
     { key: "quota", label: t("th.cost"), align: "right" },
   ];
 
+  const statIcons: Record<DetailStatKey, typeof Hash> = {
+    calls: Hash,
+    total_tokens: Zap,
+    quota: DollarSign,
+    prompt_tokens: MessageSquare,
+    completion_tokens: MessageSquare,
+    cache_creation_tokens: DatabaseZap,
+    cache_read_tokens: BookOpen,
+  };
+
   return (
     <div className="space-y-6">
       <div className="flex items-center justify-between">
@@ -98,13 +109,17 @@ export default function DetailPage() {
         <div className="flex h-64 items-center justify-center"><div className="h-6 w-6 animate-spin rounded-full spinner" /></div>
       ) : data ? (
         <>
-          <div className="grid grid-cols-2 gap-4 md:grid-cols-6">
-            <StatsCard title={t("dash.totalCalls")} value={data.calls} icon={Hash} delay={0} />
-            <StatsCard title={t("th.totalToken")} value={data.total_tokens} format="tokens" icon={Zap} delay={0.05} />
-            <StatsCard title={t("th.cost")} value={data.quota / 500000} format="usd" icon={DollarSign} delay={0.1} />
-            <StatsCard title={t("th.input")} value={data.prompt_tokens} format="tokens" icon={MessageSquare} delay={0.15} />
-            <StatsCard title={t("th.cacheCreation")} value={data.cache_creation_tokens} format="tokens" icon={DatabaseZap} delay={0.2} />
-            <StatsCard title={t("th.cacheRead")} value={data.cache_read_tokens} format="tokens" icon={BookOpen} delay={0.25} />
+          <div className="grid grid-cols-2 gap-4 md:grid-cols-4 xl:grid-cols-7">
+            {getDetailStats(data).map((stat, i) => (
+              <StatsCard
+                key={stat.key}
+                title={t(stat.labelKey)}
+                value={stat.value}
+                format={stat.format}
+                icon={statIcons[stat.key]}
+                delay={i * 0.05}
+              />
+            ))}
           </div>
 
           <motion.div initial={{ opacity: 0, y: 16 }} animate={{ opacity: 1, y: 0 }} transition={{ delay: 0.15 }} className="glass p-5">
diff --git a/lib/detail-stats.test.ts b/lib/detail-stats.test.ts
new file mode 100644
index 0000000..17824c8
--- /dev/null
+++ b/lib/detail-stats.test.ts
@@ -0,0 +1,32 @@
+import { describe, expect, test } from "bun:test";
+import { getDetailStats } from "./detail-stats";
+
+describe("getDetailStats", () => {
+  test("includes completion tokens in detail page stat cards", () => {
+    const stats = getDetailStats({
+      calls: 12,
+      total_tokens: 1000,
+      quota: 250000,
+      prompt_tokens: 400,
+      completion_tokens: 350,
+      cache_creation_tokens: 150,
+      cache_read_tokens: 100,
+    });
+
+    expect(stats.map((stat) => stat.key)).toEqual([
+      "calls",
+      "total_tokens",
+      "quota",
+      "prompt_tokens",
+      "completion_tokens",
+      "cache_creation_tokens",
+      "cache_read_tokens",
+    ]);
+    expect(stats.find((stat) => stat.key === "completion_tokens")).toEqual({
+      key: "completion_tokens",
+      labelKey: "th.output",
+      value: 350,
+      format: "tokens",
+    });
+  });
+});
diff --git a/lib/detail-stats.ts b/lib/detail-stats.ts
new file mode 100644
index 0000000..59a75bd
--- /dev/null
+++ b/lib/detail-stats.ts
@@ -0,0 +1,41 @@
+import type { TranslationKey } from "@/lib/i18n";
+
+export type DetailStatKey =
+  | "calls"
+  | "total_tokens"
+  | "quota"
+  | "prompt_tokens"
+  | "completion_tokens"
+  | "cache_creation_tokens"
+  | "cache_read_tokens";
+
+export type DetailStatFormat = "number" | "tokens" | "usd";
+
+export interface DetailStatsData {
+  calls: number;
+  total_tokens: number;
+  quota: number;
+  prompt_tokens: number;
+  completion_tokens: number;
+  cache_creation_tokens: number;
+  cache_read_tokens: number;
+}
+
+export interface DetailStatItem {
+  key: DetailStatKey;
+  labelKey: TranslationKey;
+  value: number;
+  format?: DetailStatFormat;
+}
+
+export function getDetailStats(data: DetailStatsData): DetailStatItem[] {
+  return [
+    { key: "calls", labelKey: "dash.totalCalls", value: data.calls },
+    { key: "total_tokens", labelKey: "th.totalToken", value: data.total_tokens, format: "tokens" },
+    { key: "quota", labelKey: "th.cost", value: data.quota / 500000, format: "usd" },
+    { key: "prompt_tokens", labelKey: "th.input", value: data.prompt_tokens, format: "tokens" },
+    { key: "completion_tokens", labelKey: "th.output", value: data.completion_tokens, format: "tokens" },
+    { key: "cache_creation_tokens", labelKey: "th.cacheCreation", value: data.cache_creation_tokens, format: "tokens" },
+    { key: "cache_read_tokens", labelKey: "th.cacheRead", value: data.cache_read_tokens, format: "tokens" },
+  ];
+}