diff --git a/apps/web/src/components/settings/AiModelCard.tsx b/apps/web/src/components/settings/AiModelCard.tsx
index 998a077c..504c0c60 100644
--- a/apps/web/src/components/settings/AiModelCard.tsx
+++ b/apps/web/src/components/settings/AiModelCard.tsx
@@ -32,12 +32,7 @@ import {
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
-import { Switch } from "@/components/ui/switch";
 import { api } from "@/lib/api";
-import {
-  readAiStreamingPreference,
-  writeAiStreamingPreference,
-} from "@/lib/ai-generation-preference";
 import { cn } from "@/lib/utils";
 
 export const AiModelCard = () => {
@@ -55,7 +50,6 @@ export const AiModelCard = () => {
   const [baseUrl, setBaseUrl] = useState(providerDefaults["openai-compatible"].baseUrl);
   const [apiKey, setApiKey] = useState("");
   const [initialModelId, setInitialModelId] = useState(providerDefaults["openai-compatible"].modelId);
-  const [streamingEnabled, setStreamingEnabled] = useState(readAiStreamingPreference);
 
   const refresh = () => queryClient.invalidateQueries({ queryKey: ["ai-settings"] });
   const resetAddForm = (nextDisplayName = "") => {
@@ -121,8 +115,6 @@ export const AiModelCard = () => {
     setShowAdd(true);
   };
   const addDisabledReason = !encryptionConfigured ? t("aiModel.addDisabledReason") : undefined;
-  const showStreamingPreference = typeof window === "undefined"
-    || window.edgeeverDesktop?.isAvailable !== true;
 
   return (
     <Collapsible open={expanded} onOpenChange={setExpanded} asChild>
@@ -186,23 +178,6 @@ export const AiModelCard = () => {
                         </Select>
                       </div>
                     </div>
-                    {showStreamingPreference ? (
-                      <div className="flex items-center justify-between gap-3 px-3.5 py-2.5">
-                        <div className="min-w-0">
-                          <div className={SETTINGS_ITEM_TITLE_CLASSNAME}>{t("settings.aiStreamingTitle")}</div>
-                          <div className={SETTINGS_ITEM_DESCRIPTION_CLASSNAME}>{t("settings.aiStreamingDescription")}</div>
-                        </div>
-                        <Switch
-                          className="shrink-0"
-                          checked={streamingEnabled}
-                          onCheckedChange={(enabled) => {
-                            writeAiStreamingPreference(enabled);
-                            setStreamingEnabled(enabled);
-                          }}
-                          aria-label={t("settings.aiStreamingAria")}
-                        />
-                      </div>
-                    ) : null}
                   </div>
                 </section>
                 {!defaultModelAvailable ? (
diff --git a/apps/web/src/components/settings/ai-provider-options.test.mjs b/apps/web/src/components/settings/ai-provider-options.test.mjs
index 2773e9b0..d27bd7e0 100644
--- a/apps/web/src/components/settings/ai-provider-options.test.mjs
+++ b/apps/web/src/components/settings/ai-provider-options.test.mjs
@@ -42,12 +42,7 @@ describe("AI settings cards tolerate missing text fields", () => {
     expect(modelCard).toContain("canAddProvider");
     expect(modelCard).toContain("addDisabledReason");
     expect(modelCard).toContain("savedCredentialsUnavailable");
-  });
-
-  test("hides the AI streaming preference on the desktop client", () => {
-    const modelCard = readFileSync(new URL("./AiModelCard.tsx", import.meta.url), "utf8");
-    expect(modelCard).toContain("window.edgeeverDesktop?.isAvailable !== true");
-    expect(modelCard).toContain("showStreamingPreference");
-    expect(modelCard).toContain("settings.aiStreamingTitle");
+    expect(modelCard).not.toContain("aiStreamingTitle");
+    expect(modelCard).not.toContain("readAiStreamingPreference");
   });
 });
diff --git a/apps/web/src/lib/ai-generation-preference.test.mjs b/apps/web/src/lib/ai-generation-preference.test.mjs
deleted file mode 100644
index 6b36e59b..00000000
--- a/apps/web/src/lib/ai-generation-preference.test.mjs
+++ /dev/null
@@ -1,49 +0,0 @@
-import { afterEach, describe, expect, test } from "bun:test";
-import {
-  AI_STREAMING_STORAGE_KEY,
-  readAiStreamingPreference,
-  writeAiStreamingPreference,
-} from "./ai-generation-preference.ts";
-
-const originalWindow = globalThis.window;
-
-afterEach(() => {
-  globalThis.window = originalWindow;
-});
-
-const installLocalStorage = () => {
-  const values = new Map();
-  globalThis.window = {
-    localStorage: {
-      getItem: (key) => values.get(key) ?? null,
-      setItem: (key, value) => values.set(key, String(value)),
-    },
-  };
-  return values;
-};
-
-describe("AI streaming preference", () => {
-  test("defaults to disabled and persists explicit changes", () => {
-    const values = installLocalStorage();
-    expect(readAiStreamingPreference()).toBe(false);
-
-    writeAiStreamingPreference(true);
-    expect(values.get(AI_STREAMING_STORAGE_KEY)).toBe("true");
-    expect(readAiStreamingPreference()).toBe(true);
-
-    writeAiStreamingPreference(false);
-    expect(values.get(AI_STREAMING_STORAGE_KEY)).toBe("false");
-    expect(readAiStreamingPreference()).toBe(false);
-  });
-
-  test("fails closed when local storage is unavailable", () => {
-    globalThis.window = {
-      localStorage: {
-        getItem: () => { throw new Error("blocked"); },
-        setItem: () => { throw new Error("blocked"); },
-      },
-    };
-    expect(readAiStreamingPreference()).toBe(false);
-    expect(() => writeAiStreamingPreference(true)).not.toThrow();
-  });
-});
diff --git a/apps/web/src/lib/ai-generation-preference.ts b/apps/web/src/lib/ai-generation-preference.ts
deleted file mode 100644
index 42df7cab..00000000
--- a/apps/web/src/lib/ai-generation-preference.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-export const AI_STREAMING_STORAGE_KEY = "edgeever.aiStreamingEnabled";
-
-export const readAiStreamingPreference = () => {
-  try {
-    return typeof window !== "undefined"
-      && window.localStorage.getItem(AI_STREAMING_STORAGE_KEY) === "true";
-  } catch {
-    return false;
-  }
-};
-
-export const writeAiStreamingPreference = (enabled: boolean) => {
-  try {
-    window.localStorage.setItem(AI_STREAMING_STORAGE_KEY, enabled ? "true" : "false");
-  } catch {
-    // Local storage can be unavailable in private or restricted browser contexts.
-  }
-};
diff --git a/apps/web/src/lib/api.test.mjs b/apps/web/src/lib/api.test.mjs
index b8f5c3f8..e7c03da4 100644
--- a/apps/web/src/lib/api.test.mjs
+++ b/apps/web/src/lib/api.test.mjs
@@ -392,7 +392,7 @@ describe("desktop instance setup", () => {
     }
   });
 
-  test("sends the disabled-by-default AI streaming preference and honors opt-in", async () => {
+  test("does not opt the web proxy into AI streaming", async () => {
     const requestBodies = [];
     globalThis.fetch = async (url, init) => {
       if (String(url).includes("/api/v1/ai/direct-target")) {
@@ -403,14 +403,13 @@ describe("desktop instance setup", () => {
         headers: { "Content-Type": "text/event-stream" },
       });
     };
-    const payload = { action: "summarize", title: "Note", contentMarkdown: "Body" };
 
-    storage.delete("edgeever.aiStreamingEnabled");
-    await api.streamAiGeneration(payload, { onEvent: () => {} });
-    storage.set("edgeever.aiStreamingEnabled", "true");
-    await api.streamAiGeneration(payload, { onEvent: () => {} });
-    await api.streamAiGeneration({ ...payload, stream: false }, { onEvent: () => {} });
+    await api.streamAiGeneration(
+      { action: "summarize", title: "Note", contentMarkdown: "Body" },
+      { onEvent: () => {} },
+    );
 
-    expect(requestBodies.map((body) => body.stream)).toEqual([false, true, false]);
+    expect(requestBodies).toHaveLength(1);
+    expect(requestBodies[0].stream).toBeUndefined();
   });
 });
diff --git a/apps/web/src/lib/api.ts b/apps/web/src/lib/api.ts
index 1a7c11bf..f0aca4e7 100644
--- a/apps/web/src/lib/api.ts
+++ b/apps/web/src/lib/api.ts
@@ -5,7 +5,6 @@ import {
 } from "@edgeever/client";
 import type { AuthSession } from "@edgeever/shared";
 import { resolveInstanceUrlInput } from "@edgeever/shared";
-import { readAiStreamingPreference } from "./ai-generation-preference";
 import { createClientUuid } from "./client-id";
 
 export { ApiRequestError };
@@ -335,12 +334,4 @@ export const api = {
     desktopSessionRejected = false;
     return session;
   },
-
-  streamAiGeneration: (
-    payload: Parameters<typeof client.streamAiGeneration>[0],
-    options: Parameters<typeof client.streamAiGeneration>[1],
-  ) => client.streamAiGeneration(
-    { ...payload, stream: payload.stream ?? readAiStreamingPreference() },
-    options,
-  ),
 };
diff --git a/packages/shared/src/i18n/en-US.ts b/packages/shared/src/i18n/en-US.ts
index 8d4e47f4..ed7fb52f 100644
--- a/packages/shared/src/i18n/en-US.ts
+++ b/packages/shared/src/i18n/en-US.ts
@@ -573,9 +573,6 @@ export const enUS = {
     imageCompressionTitle: "Compress note images",
     imageCompressionDescription: "Compress large images locally before upload to reduce storage use.",
     imageCompressionAria: "Compress note images",
-    aiStreamingTitle: "Stream AI responses",
-    aiStreamingDescription: "Turn on to watch AI content generation in real time; turn off for greater stability.",
-    aiStreamingAria: "Stream AI responses",
     aiTagPromptTitle: "AI tag suggestion instruction",
     aiTagPromptDescription: "Customize how AI derives tags from note content. This workspace setting is shared by every client.",
     aiTagPromptRestore: "Restore default instruction",
diff --git a/packages/shared/src/i18n/zh-CN.ts b/packages/shared/src/i18n/zh-CN.ts
index dd87c7f0..49b95e7e 100644
--- a/packages/shared/src/i18n/zh-CN.ts
+++ b/packages/shared/src/i18n/zh-CN.ts
@@ -573,9 +573,6 @@ export const zhCN = {
     imageCompressionTitle: "压缩笔记内图片",
     imageCompressionDescription: "上传大图时在本地压缩，节省资源占用。",
     imageCompressionAria: "是否压缩笔记内图片",
-    aiStreamingTitle: "流式返回 AI 结果",
-    aiStreamingDescription: "开启后实时展示 AI 内容生成过程；关闭可获得更高稳定性。",
-    aiStreamingAria: "是否流式返回 AI 结果",
     aiTagPromptTitle: "AI 标签建议指令",
     aiTagPromptDescription: "自定义 AI 如何根据笔记内容生成标签。此设置保存在工作区，各端共用。",
     aiTagPromptRestore: "恢复默认指令",