diff --git a/frontend/src/views/admin/__tests__/groupsOpenAIFast.spec.ts b/frontend/src/views/admin/__tests__/groupsOpenAIFast.spec.ts
new file mode 100644
index 0000000000..e94ee5a36c
--- /dev/null
+++ b/frontend/src/views/admin/__tests__/groupsOpenAIFast.spec.ts
@@ -0,0 +1,36 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  normalizeGroupOpenAIFast,
+  supportsGroupOpenAIFast,
+} from "../groupsOpenAIFast";
+import en from "@/i18n/locales/en/admin/overview";
+import zh from "@/i18n/locales/zh/admin/overview";
+
+describe("groupsOpenAIFast", () => {
+  it("supports OpenAI and composite groups", () => {
+    expect(supportsGroupOpenAIFast("openai")).toBe(true);
+    expect(supportsGroupOpenAIFast("composite")).toBe(true);
+    expect(supportsGroupOpenAIFast("anthropic")).toBe(false);
+  });
+
+  it("clears stale enabled state on unsupported platforms", () => {
+    expect(normalizeGroupOpenAIFast("openai", true)).toBe(true);
+    expect(normalizeGroupOpenAIFast("composite", true)).toBe(true);
+    expect(normalizeGroupOpenAIFast("anthropic", true)).toBe(false);
+    expect(normalizeGroupOpenAIFast("openai", false)).toBe(false);
+  });
+
+  it("provides localized switch labels", () => {
+    expect(zh.groups.openaiFast).toMatchObject({
+      title: expect.any(String),
+      force: expect.any(String),
+      hint: expect.stringContaining("service_tier=priority"),
+    });
+    expect(en.groups.openaiFast).toMatchObject({
+      title: expect.any(String),
+      force: expect.any(String),
+      hint: expect.stringContaining("service_tier=priority"),
+    });
+  });
+});
diff --git a/frontend/src/views/admin/groupsOpenAIFast.ts b/frontend/src/views/admin/groupsOpenAIFast.ts
new file mode 100644
index 0000000000..a4e3f544a2
--- /dev/null
+++ b/frontend/src/views/admin/groupsOpenAIFast.ts
@@ -0,0 +1,10 @@
+export function supportsGroupOpenAIFast(platform: string): boolean {
+  return platform === "openai" || platform === "composite";
+}
+
+export function normalizeGroupOpenAIFast(
+  platform: string,
+  enabled: boolean,
+): boolean {
+  return supportsGroupOpenAIFast(platform) && enabled;
+}