diff --git a/config.example.json b/config.example.json
index e162cbb..bc6b373 100644
--- a/config.example.json
+++ b/config.example.json
@@ -17,13 +17,16 @@
         },
         "glm-5.1": {
           "name": "GLM-5.1"
+        },
+        "glm-5-turbo": {
+          "name": "GLM-5-Turbo"
         }
       }
     }
   },
   "model": {
     "main": "zai/glm-5.2",
-    "lite": "zai/glm-5.1"
+    "lite": "zai/glm-5-turbo"
   },
   "modelCatalog": {
     "overrides": {}
diff --git a/scripts/check-runtime.ts b/scripts/check-runtime.ts
index 48cc87f..5cb852a 100755
--- a/scripts/check-runtime.ts
+++ b/scripts/check-runtime.ts
@@ -6,7 +6,10 @@ import { dirname, join, resolve } from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";
 
 import { formatVersionOutput, readDistributionVersion } from "../src/launcher.ts";
-import { supportsMultiMessageFileRewind } from "./sync-runtime.ts";
+import {
+  patchRuntimeLoginModelDefaults,
+  supportsMultiMessageFileRewind
+} from "./sync-runtime.ts";
 
 const root = resolve(dirname(fileURLToPath(import.meta.url)), "..");
 const runtime = join(root, "vendor", "zcode.cjs");
@@ -30,7 +33,8 @@ if (packageManifest.dependencies?.["playwright-core"] !== "1.59.1"
 }
 
 const runtimeSource = await Bun.file(runtime).text();
-if (!runtimeSource.includes('"plugin://"')
+if (patchRuntimeLoginModelDefaults(runtimeSource) !== runtimeSource
+  || !runtimeSource.includes('"plugin://"')
   || !runtimeSource.includes('return await import("playwright-core")')
   || !runtimeSource.includes('pluginsReferenceCatalog:"plugins/referenceCatalog"')
   || !runtimeSource.includes('pluginsMarketplaceAdd:"plugins/marketplace/add"')
diff --git a/scripts/smoke-tui.ts b/scripts/smoke-tui.ts
index 78e7449..658a256 100755
--- a/scripts/smoke-tui.ts
+++ b/scripts/smoke-tui.ts
@@ -194,9 +194,26 @@ try {
   );
   await waitFor(
     "API key turn completion",
-    /(?:Configured Z\.AI Coding Plan|已配置 Z\.AI Coding Plan)[\s\S]*◈ zai\/glm-5\.1/i,
+    /(?:Configured Z\.AI Coding Plan|已配置 Z\.AI Coding Plan)[\s\S]*◈ zai\/glm-5\.2/i,
     apiKeySetupStart
   );
+  await sendAndWait("/login\r", "reopened login setup picker", /Set Up Coding Plan|配置 Coding Plan/i);
+  await sendAndWait(
+    "\x1b[B\x1b[B\x1b[B\r",
+    "BigModel masked API key prompt",
+    /Enter BigModel Coding Plan API Key|输入 BigModel Coding Plan API Key/i
+  );
+  await sendAndWait(smokeApiKey, "BigModel masked API key value", /\*{20,}/i);
+  const bigmodelSetupStart = await sendAndWait(
+    "\r",
+    "BigModel API key setup",
+    /Configured BigModel Coding Plan|已配置 BigModel Coding Plan/i
+  );
+  await waitFor(
+    "BigModel API key turn completion",
+    /(?:Configured BigModel Coding Plan|已配置 BigModel Coding Plan)[\s\S]*◈ bigmodel\/glm-5\.2/i,
+    bigmodelSetupStart
+  );
   await sendAndWait("/help\r", "help output", /Slash commands:|Usage:/i);
   await sendAndWait("/mode plan\r", "plan mode", /mode switched to plan|current mode: plan|◈ default ─ ◉ plan/i);
   terminal.write("/exit\r");
@@ -259,7 +276,9 @@ if (/Model config is missing/i.test(plain)) {
 if (plain.includes(smokeApiKey)) {
   throw new Error(`The API key leaked into terminal output.\n${plain.slice(-4_000)}`);
 }
-if (!configured.includes(smokeApiKey) || !configured.includes('"main": "zai/')) {
+if (!configured.includes(smokeApiKey)
+  || !configured.includes('"main": "bigmodel/glm-5.2"')
+  || !configured.includes('"lite": "bigmodel/glm-4.7"')) {
   throw new Error("The official runtime did not persist the Coding Plan configuration.");
 }
 if (leakedFiles.length > 0) {
diff --git a/scripts/sync-runtime.ts b/scripts/sync-runtime.ts
index cab6fcf..80e2815 100755
--- a/scripts/sync-runtime.ts
+++ b/scripts/sync-runtime.ts
@@ -715,17 +715,60 @@ async function installLocalTui(nextVendor: string): Promise<void> {
   await cp(join(source, "dist"), join(target, "dist"), { recursive: true });
 }
 
+/** Align Coding Plan defaults without depending on platform-specific minifier names. */
+export function patchRuntimeLoginModelDefaults(runtime: string): string {
+  const presetPattern = /([A-Za-z_$][\w$]*)="zai\/glm-(?:5\.1|5\.2)",([A-Za-z_$][\w$]*)="zai\/glm-(?:4\.7|5-turbo)",([A-Za-z_$][\w$]*)="bigmodel\/glm-(?:5\.1|5\.2)",([A-Za-z_$][\w$]*)="bigmodel\/glm-4\.7"/u;
+  const modelIdPattern = /([A-Za-z_$][\w$]*)="glm-(?:5\.1|5\.2)",([A-Za-z_$][\w$]*)="glm-(?:4\.7|5-turbo)"/u;
+  const modelEntriesPattern = /models:\{\.\.\.([A-Za-z_$][\w$]*),\[([A-Za-z_$][\w$]*)\]:\{\.\.\.([A-Za-z_$][\w$]*),name:"GLM-5\.(?:1|2)"\},\[([A-Za-z_$][\w$]*)\]:\{\.\.\.([A-Za-z_$][\w$]*),name:"GLM-(?:4\.7|5-Turbo)"\}(?:,\["glm-5-turbo"\]:\{\.\.\.\1\["glm-5-turbo"\],name:"GLM-5-Turbo"\})?\}/u;
+  const legacyLiteSelectionPattern = /([A-Za-z_$][\w$]*)=typeof ([A-Za-z_$][\w$]*)\.lite=="string"\?\2\.lite:([A-Za-z_$][\w$]*)\.liteModel/u;
+  const scopedLiteSelectionPattern = /([A-Za-z_$][\w$]*)=typeof ([A-Za-z_$][\w$]*)\.lite=="string"&&\2\.lite\.startsWith\(([A-Za-z_$][\w$]*)\.mainModel\.slice\(0,\3\.mainModel\.indexOf\("\/"\)\+1\)\)\?\2\.lite:\3\.liteModel/u;
+
+  const preset = presetPattern.exec(runtime);
+  const modelIds = modelIdPattern.exec(runtime);
+  const modelEntries = modelEntriesPattern.exec(runtime);
+  if (!preset || !modelIds || !modelEntries
+    || modelIds[1] !== modelEntries[2]
+    || modelIds[2] !== modelEntries[4]) {
+    throw new Error("ZCode runtime is incompatible with the login model defaults patch (model preset/catalog anchors missing).");
+  }
+
+  let patched = runtime
+    .replace(
+      preset[0],
+      `${preset[1]}="zai/glm-5.2",${preset[2]}="zai/glm-5-turbo",${preset[3]}="bigmodel/glm-5.2",${preset[4]}="bigmodel/glm-4.7"`
+    )
+    .replace(modelIds[0], `${modelIds[1]}="glm-5.2",${modelIds[2]}="glm-4.7"`)
+    .replace(
+      modelEntries[0],
+      `models:{...${modelEntries[1]},[${modelEntries[2]}]:{...${modelEntries[3]},name:"GLM-5.2"},[${modelEntries[4]}]:{...${modelEntries[5]},name:"GLM-4.7"},["glm-5-turbo"]:{...${modelEntries[1]}["glm-5-turbo"],name:"GLM-5-Turbo"}}`
+    );
+
+  const legacyLiteSelection = legacyLiteSelectionPattern.exec(patched);
+  if (legacyLiteSelection) {
+    const [, selection, model, selectedPreset] = legacyLiteSelection;
+    patched = patched.replace(
+      legacyLiteSelection[0],
+      `${selection}=typeof ${model}.lite=="string"&&${model}.lite.startsWith(${selectedPreset}.mainModel.slice(0,${selectedPreset}.mainModel.indexOf("/")+1))?${model}.lite:${selectedPreset}.liteModel`
+    );
+  } else if (!scopedLiteSelectionPattern.test(patched)) {
+    throw new Error("ZCode runtime is incompatible with the login model defaults patch (lite model anchor missing).");
+  }
+  return patched;
+}
+
 async function installTuiBridge(nextVendor: string): Promise<void> {
   const runtimePath = join(nextVendor, "zcode.cjs");
   const runtime = await readFile(runtimePath, "utf8");
   await writeFile(
     runtimePath,
-    patchRuntimeZaiDesktopOAuth(
-      patchRuntimeOAuthHttpErrors(
-        patchRuntimeAgentAutoBackground(
-          patchRuntimeDetachedAgentLifecycle(
-            patchRuntimeTerminalToolProjection(
-              patchRuntimeBackgroundTaskProjection(patchRuntimeTuiBridge(runtime))
+    patchRuntimeLoginModelDefaults(
+      patchRuntimeZaiDesktopOAuth(
+        patchRuntimeOAuthHttpErrors(
+          patchRuntimeAgentAutoBackground(
+            patchRuntimeDetachedAgentLifecycle(
+              patchRuntimeTerminalToolProjection(
+                patchRuntimeBackgroundTaskProjection(patchRuntimeTuiBridge(runtime))
+              )
             )
           )
         )
diff --git a/test/config-bootstrap.test.ts b/test/config-bootstrap.test.ts
index 60cb4f6..e830d49 100644
--- a/test/config-bootstrap.test.ts
+++ b/test/config-bootstrap.test.ts
@@ -55,7 +55,8 @@ describe("user config bootstrap", () => {
     expect(config.provider.zai.options.apiKey).toBeUndefined();
     expect(config.provider.zai.models["glm-5.2"]).toBeDefined();
     expect(config.provider.zai.models["glm-5.1"]).toBeDefined();
-    expect(config.model).toEqual({ main: "zai/glm-5.2", lite: "zai/glm-5.1" });
+    expect(config.provider.zai.models["glm-5-turbo"]).toBeDefined();
+    expect(config.model).toEqual({ main: "zai/glm-5.2", lite: "zai/glm-5-turbo" });
     expect(config.modelStream.idleTimeoutMs).toBe(60_000);
     expect(config.subagents.autoBackgroundMs).toBe(1_000);
     expect(await readConfiguredModelAccess(env)).toBeNull();
diff --git a/test/config-template.test.ts b/test/config-template.test.ts
index 4766d21..c4cad05 100644
--- a/test/config-template.test.ts
+++ b/test/config-template.test.ts
@@ -48,4 +48,7 @@ test("custom-provider config template is internally consistent", async () => {
   expect(config.subagents.autoBackgroundMs).toBe(1_000);
   expect(config.ui.theme).toBe("auto");
   expect(config.ui.notifications).toEqual({ method: "auto", condition: "unfocused" });
+  // The runtime's user-config model schema is strict: only main/lite are accepted
+  // (model.available is a runtime-internal key injected by the app host, not user config).
+  expect(Object.keys(config.model).sort()).toEqual(["lite", "main"]);
 });
diff --git a/test/sync-runtime.test.ts b/test/sync-runtime.test.ts
index d923de3..a08a1a0 100644
--- a/test/sync-runtime.test.ts
+++ b/test/sync-runtime.test.ts
@@ -8,8 +8,9 @@ import {
   patchRuntimeAgentAutoBackground,
   patchRuntimeBackgroundTaskProjection,
   patchRuntimeDetachedAgentLifecycle,
-  patchRuntimeTerminalToolProjection,
+  patchRuntimeLoginModelDefaults,
   patchRuntimeOAuthHttpErrors,
+  patchRuntimeTerminalToolProjection,
   patchRuntimeTuiBridge,
   patchRuntimeZaiDesktopOAuth,
   resolveArtifactUrl,
@@ -203,6 +204,74 @@ describe("runtime synchronization", () => {
     });
   });
 
+  test("updates the login model defaults to the current server catalog", () => {
+    const runtime = [
+      'function Cs(e){return typeof e==="object"&&e!==null&&!Array.isArray(e)}',
+      'function Pni(e,t,r){let o=ICt[t],n=Cs(e.provider)?e.provider:{},',
+      'i=Cs(n[t])?n[t]:{},a=Cs(i.options)?i.options:{},u=Cs(i.models)?i.models:{},',
+      'l=Cs(u[kCt])?u[kCt]:{},c=Cs(u[SCt])?u[SCt]:{},d=Cs(e.model)?e.model:{},',
+      'p=typeof d.lite=="string"?d.lite:o.liteModel,m={...a,apiKeyRequired:true,baseURL:o.baseURL};',
+      'return r.length>0&&(m.apiKey=r),{...e,provider:{...n,[t]:{...i,kind:xni,name:o.displayName,options:m,',
+      'models:{...u,[kCt]:{...l,name:"GLM-5.1"},[SCt]:{...c,name:"GLM-4.7"}}}},',
+      'model:{...d,main:o.mainModel,lite:p}}}',
+      'var fni="bigmodel",hni="zai",',
+      'gni="zai/glm-5.1",_ni="zai/glm-4.7",vni="bigmodel/glm-5.1",yni="bigmodel/glm-4.7",',
+      'kCt="glm-5.1",SCt="glm-4.7",xni="anthropic",',
+      'ICt={[fni]:{baseURL:"https://open.bigmodel.cn/api/anthropic",displayName:"BigModel Coding Plan",',
+      'liteModel:yni,mainModel:vni},[hni]:{baseURL:"https://api.z.ai/api/anthropic",',
+      'displayName:"Z.AI Coding Plan",liteModel:_ni,mainModel:gni}};'
+    ].join("");
+    const patched = patchRuntimeLoginModelDefaults(runtime);
+    const updateConfig = new Function(`${patched};return Pni;`)() as (
+      config: Record<string, unknown>,
+      providerId: string,
+      apiKey: string
+    ) => {
+      model: { lite: string; main: string };
+      provider: Record<string, { models: Record<string, unknown> }>;
+    };
+
+    expect(patched).toContain(
+      'gni="zai/glm-5.2",_ni="zai/glm-5-turbo",vni="bigmodel/glm-5.2",yni="bigmodel/glm-4.7"'
+    );
+    expect(patched).toContain('kCt="glm-5.2",SCt="glm-4.7"');
+    expect(patched).toContain('["glm-5-turbo"]:{...u["glm-5-turbo"],name:"GLM-5-Turbo"}');
+    expect(patched).not.toContain('gni="zai/glm-5.1"');
+    expect(patched).not.toContain('"GLM-5.1"');
+
+    const zai = updateConfig({}, "zai", "zai-key");
+    expect(zai.model).toEqual({ main: "zai/glm-5.2", lite: "zai/glm-5-turbo" });
+    expect(Object.keys(zai.provider.zai!.models).sort()).toEqual([
+      "glm-4.7",
+      "glm-5-turbo",
+      "glm-5.2"
+    ]);
+
+    const bigmodel = updateConfig({}, "bigmodel", "bigmodel-key");
+    expect(bigmodel.model).toEqual({ main: "bigmodel/glm-5.2", lite: "bigmodel/glm-4.7" });
+    expect(bigmodel.provider.bigmodel!.models["glm-4.7"]).toBeDefined();
+    expect(updateConfig(
+      { model: { lite: "zai/custom-lite" } },
+      "bigmodel",
+      "bigmodel-key"
+    ).model.lite).toBe("bigmodel/glm-4.7");
+    expect(updateConfig(
+      { model: { lite: "bigmodel/custom-lite" } },
+      "bigmodel",
+      "bigmodel-key"
+    ).model.lite).toBe("bigmodel/custom-lite");
+
+    const partiallyUpdated = runtime.replace(
+      'gni="zai/glm-5.1",_ni="zai/glm-4.7",vni="bigmodel/glm-5.1",yni="bigmodel/glm-4.7"',
+      'gni="zai/glm-5.2",_ni="zai/glm-5-turbo",vni="bigmodel/glm-5.2",yni="bigmodel/glm-4.7"'
+    );
+    expect(patchRuntimeLoginModelDefaults(partiallyUpdated)).toBe(patched);
+    expect(patchRuntimeLoginModelDefaults(patched)).toBe(patched);
+    expect(() => patchRuntimeLoginModelDefaults("incompatible runtime")).toThrow(
+      /login model defaults patch/
+    );
+  });
+
   test("maps supported static updater manifests", () => {
     expect(manifestUrl("linux", "x64")).toMatch(/update\/linux\/x64\/latest-linux\.yml$/);
     expect(manifestUrl("darwin", "arm64")).toMatch(/update\/mac\/arm64\/latest-mac\.yml$/);