diff --git a/esbuild.config.js b/esbuild.config.js
index 7d38c2a7..9f24d0ba 100644
--- a/esbuild.config.js
+++ b/esbuild.config.js
@@ -7,7 +7,7 @@
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { createRequire } from 'node:module';
-import { writeFileSync } from 'node:fs';
+import { writeFileSync, rmSync } from 'node:fs';
 
 let esbuild;
 try {
@@ -22,6 +22,9 @@ const __dirname = path.dirname(__filename);
 const require = createRequire(import.meta.url);
 const pkg = require(path.resolve(__dirname, 'package.json'));
 
+// Clean dist directory (cross-platform)
+rmSync(path.resolve(__dirname, 'dist'), { recursive: true, force: true });
+
 const external = [
   '@lydell/node-pty',
   'node-pty',
diff --git a/package.json b/package.json
index dffb3d1d..3e4d1e02 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "build:all": "npm run build && npm run build:sandbox && npm run build:vscode",
     "build:packages": "npm run build --workspaces",
     "build:sandbox": "node scripts/build_sandbox.js",
-    "bundle": "rm -rf dist && npm run generate && node esbuild.config.js && node scripts/copy_bundle_assets.js",
+    "bundle": "npm run generate && node esbuild.config.js && node scripts/copy_bundle_assets.js",
     "test": "npm run test --workspaces --if-present --parallel",
     "test:ci": "npm run test:ci --workspaces --if-present --parallel && npm run test:scripts",
     "test:scripts": "vitest run --config ./scripts/tests/vitest.config.ts",
diff --git a/packages/cli/src/config/auth.test.ts b/packages/cli/src/config/auth.test.ts
index b69c5fb0..e28184ac 100644
--- a/packages/cli/src/config/auth.test.ts
+++ b/packages/cli/src/config/auth.test.ts
@@ -18,60 +18,26 @@ vi.mock('./settings.js', () => ({
 describe('validateAuthMethod', () => {
   beforeEach(() => {
     vi.resetModules();
-    vi.stubEnv('GEMINI_API_KEY', undefined);
-    vi.stubEnv('GOOGLE_CLOUD_PROJECT', undefined);
-    vi.stubEnv('GOOGLE_CLOUD_LOCATION', undefined);
-    vi.stubEnv('GOOGLE_API_KEY', undefined);
   });
 
   afterEach(() => {
     vi.unstubAllEnvs();
   });
 
-  it('should return null for LOGIN_WITH_GOOGLE', () => {
-    expect(validateAuthMethod(AuthType.LOGIN_WITH_GOOGLE)).toBeNull();
+  it('should return null for USE_OPENAI', () => {
+    process.env['OPENAI_API_KEY'] = 'fake-key';
+    expect(validateAuthMethod(AuthType.USE_OPENAI)).toBeNull();
   });
 
-  it('should return null for CLOUD_SHELL', () => {
-    expect(validateAuthMethod(AuthType.CLOUD_SHELL)).toBeNull();
+  it('should return an error message for USE_OPENAI if OPENAI_API_KEY is not set', () => {
+    delete process.env['OPENAI_API_KEY'];
+    expect(validateAuthMethod(AuthType.USE_OPENAI)).toBe(
+      'OPENAI_API_KEY environment variable not found. You can enter it interactively or add it to your .env file.',
+    );
   });
 
-  describe('USE_GEMINI', () => {
-    it('should return null if GEMINI_API_KEY is set', () => {
-      vi.stubEnv('GEMINI_API_KEY', 'test-key');
-      expect(validateAuthMethod(AuthType.USE_GEMINI)).toBeNull();
-    });
-
-    it('should return an error message if GEMINI_API_KEY is not set', () => {
-      vi.stubEnv('GEMINI_API_KEY', undefined);
-      expect(validateAuthMethod(AuthType.USE_GEMINI)).toBe(
-        'GEMINI_API_KEY environment variable not found. Add that to your environment and try again (no reload needed if using .env)!',
-      );
-    });
-  });
-
-  describe('USE_VERTEX_AI', () => {
-    it('should return null if GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION are set', () => {
-      vi.stubEnv('GOOGLE_CLOUD_PROJECT', 'test-project');
-      vi.stubEnv('GOOGLE_CLOUD_LOCATION', 'test-location');
-      expect(validateAuthMethod(AuthType.USE_VERTEX_AI)).toBeNull();
-    });
-
-    it('should return null if GOOGLE_API_KEY is set', () => {
-      vi.stubEnv('GOOGLE_API_KEY', 'test-api-key');
-      expect(validateAuthMethod(AuthType.USE_VERTEX_AI)).toBeNull();
-    });
-
-    it('should return an error message if no required environment variables are set', () => {
-      vi.stubEnv('GOOGLE_CLOUD_PROJECT', undefined);
-      vi.stubEnv('GOOGLE_CLOUD_LOCATION', undefined);
-      expect(validateAuthMethod(AuthType.USE_VERTEX_AI)).toBe(
-        'When using Vertex AI, you must specify either:\n' +
-          '• GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION environment variables.\n' +
-          '• GOOGLE_API_KEY environment variable (if using express mode).\n' +
-          'Update your environment and try again (no reload needed if using .env)!',
-      );
-    });
+  it('should return null for QWEN_OAUTH', () => {
+    expect(validateAuthMethod(AuthType.QWEN_OAUTH)).toBeNull();
   });
 
   it('should return an error message for an invalid auth method', () => {
diff --git a/packages/cli/src/config/auth.ts b/packages/cli/src/config/auth.ts
index dfc0d50b..83761e3e 100644
--- a/packages/cli/src/config/auth.ts
+++ b/packages/cli/src/config/auth.ts
@@ -8,39 +8,13 @@ import { AuthType } from '@qwen-code/qwen-code-core';
 import { loadEnvironment, loadSettings } from './settings.js';
 
 export function validateAuthMethod(authMethod: string): string | null {
-  loadEnvironment(loadSettings().merged);
-  if (
-    authMethod === AuthType.LOGIN_WITH_GOOGLE ||
-    authMethod === AuthType.CLOUD_SHELL
-  ) {
-    return null;
-  }
-
-  if (authMethod === AuthType.USE_GEMINI) {
-    if (!process.env['GEMINI_API_KEY']) {
-      return 'GEMINI_API_KEY environment variable not found. Add that to your environment and try again (no reload needed if using .env)!';
-    }
-    return null;
-  }
-
-  if (authMethod === AuthType.USE_VERTEX_AI) {
-    const hasVertexProjectLocationConfig =
-      !!process.env['GOOGLE_CLOUD_PROJECT'] &&
-      !!process.env['GOOGLE_CLOUD_LOCATION'];
-    const hasGoogleApiKey = !!process.env['GOOGLE_API_KEY'];
-    if (!hasVertexProjectLocationConfig && !hasGoogleApiKey) {
-      return (
-        'When using Vertex AI, you must specify either:\n' +
-        '• GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION environment variables.\n' +
-        '• GOOGLE_API_KEY environment variable (if using express mode).\n' +
-        'Update your environment and try again (no reload needed if using .env)!'
-      );
-    }
-    return null;
-  }
+  const settings = loadSettings();
+  loadEnvironment(settings.merged);
 
   if (authMethod === AuthType.USE_OPENAI) {
-    if (!process.env['OPENAI_API_KEY']) {
+    const hasApiKey =
+      process.env['OPENAI_API_KEY'] || settings.merged.security?.auth?.apiKey;
+    if (!hasApiKey) {
       return 'OPENAI_API_KEY environment variable not found. You can enter it interactively or add it to your .env file.';
     }
     return null;
@@ -54,15 +28,3 @@ export function validateAuthMethod(authMethod: string): string | null {
 
   return 'Invalid auth method selected.';
 }
-
-export const setOpenAIApiKey = (apiKey: string): void => {
-  process.env['OPENAI_API_KEY'] = apiKey;
-};
-
-export const setOpenAIBaseUrl = (baseUrl: string): void => {
-  process.env['OPENAI_BASE_URL'] = baseUrl;
-};
-
-export const setOpenAIModel = (model: string): void => {
-  process.env['OPENAI_MODEL'] = model;
-};
diff --git a/packages/cli/src/config/config.ts b/packages/cli/src/config/config.ts
index 7296ff43..f7752df6 100755
--- a/packages/cli/src/config/config.ts
+++ b/packages/cli/src/config/config.ts
@@ -13,7 +13,6 @@ import { extensionsCommand } from '../commands/extensions.js';
 import {
   ApprovalMode,
   Config,
-  DEFAULT_QWEN_MODEL,
   DEFAULT_QWEN_EMBEDDING_MODEL,
   DEFAULT_MEMORY_FILE_FILTERING_OPTIONS,
   EditTool,
@@ -669,13 +668,11 @@ export async function loadCliConfig(
     );
   }
 
-  const defaultModel = DEFAULT_QWEN_MODEL;
-  const resolvedModel: string =
+  const resolvedModel =
     argv.model ||
     process.env['OPENAI_MODEL'] ||
     process.env['QWEN_MODEL'] ||
-    settings.model?.name ||
-    defaultModel;
+    settings.model?.name;
 
   const sandboxConfig = await loadSandboxConfig(settings, argv);
   const screenReader =
@@ -739,8 +736,14 @@ export async function loadCliConfig(
     generationConfig: {
       ...(settings.model?.generationConfig || {}),
       model: resolvedModel,
-      apiKey: argv.openaiApiKey || process.env['OPENAI_API_KEY'],
-      baseUrl: argv.openaiBaseUrl || process.env['OPENAI_BASE_URL'],
+      apiKey:
+        argv.openaiApiKey ||
+        process.env['OPENAI_API_KEY'] ||
+        settings.security?.auth?.apiKey,
+      baseUrl:
+        argv.openaiBaseUrl ||
+        process.env['OPENAI_BASE_URL'] ||
+        settings.security?.auth?.baseUrl,
       enableOpenAILogging:
         (typeof argv.openaiLogging === 'undefined'
           ? settings.model?.enableOpenAILogging
diff --git a/packages/cli/src/config/settingsSchema.ts b/packages/cli/src/config/settingsSchema.ts
index 34ebe4b0..0fd492fa 100644
--- a/packages/cli/src/config/settingsSchema.ts
+++ b/packages/cli/src/config/settingsSchema.ts
@@ -991,6 +991,24 @@ const SETTINGS_SCHEMA = {
             description: 'Whether to use an external authentication flow.',
             showInDialog: false,
           },
+          apiKey: {
+            type: 'string',
+            label: 'API Key',
+            category: 'Security',
+            requiresRestart: true,
+            default: undefined as string | undefined,
+            description: 'API key for OpenAI compatible authentication.',
+            showInDialog: false,
+          },
+          baseUrl: {
+            type: 'string',
+            label: 'Base URL',
+            category: 'Security',
+            requiresRestart: true,
+            default: undefined as string | undefined,
+            description: 'Base URL for OpenAI compatible API.',
+            showInDialog: false,
+          },
         },
       },
     },
diff --git a/packages/cli/src/gemini.tsx b/packages/cli/src/gemini.tsx
index d5ffd023..46c1052f 100644
--- a/packages/cli/src/gemini.tsx
+++ b/packages/cli/src/gemini.tsx
@@ -17,11 +17,7 @@ import dns from 'node:dns';
 import { randomUUID } from 'node:crypto';
 import { start_sandbox } from './utils/sandbox.js';
 import type { DnsResolutionOrder, LoadedSettings } from './config/settings.js';
-import {
-  loadSettings,
-  migrateDeprecatedSettings,
-  SettingScope,
-} from './config/settings.js';
+import { loadSettings, migrateDeprecatedSettings } from './config/settings.js';
 import { themeManager } from './ui/themes/theme-manager.js';
 import { getStartupWarnings } from './utils/startupWarnings.js';
 import { getUserStartupWarnings } from './utils/userStartupWarnings.js';
@@ -233,17 +229,6 @@ export async function main() {
     validateDnsResolutionOrder(settings.merged.advanced?.dnsResolutionOrder),
   );
 
-  // Set a default auth type if one isn't set.
-  if (!settings.merged.security?.auth?.selectedType) {
-    if (process.env['CLOUD_SHELL'] === 'true') {
-      settings.setValue(
-        SettingScope.User,
-        'selectedAuthType',
-        AuthType.CLOUD_SHELL,
-      );
-    }
-  }
-
   // Load custom themes from settings
   themeManager.loadCustomThemes(settings.merged.ui?.customThemes);
 
diff --git a/packages/cli/src/ui/auth/AuthDialog.tsx b/packages/cli/src/ui/auth/AuthDialog.tsx
index f5b9f4be..4104a775 100644
--- a/packages/cli/src/ui/auth/AuthDialog.tsx
+++ b/packages/cli/src/ui/auth/AuthDialog.tsx
@@ -8,12 +8,7 @@ import type React from 'react';
 import { useState } from 'react';
 import { AuthType } from '@qwen-code/qwen-code-core';
 import { Box, Text } from 'ink';
-import {
-  setOpenAIApiKey,
-  setOpenAIBaseUrl,
-  setOpenAIModel,
-  validateAuthMethod,
-} from '../../config/auth.js';
+import { validateAuthMethod } from '../../config/auth.js';
 import { type LoadedSettings, SettingScope } from '../../config/settings.js';
 import { Colors } from '../colors.js';
 import { useKeypress } from '../hooks/useKeypress.js';
@@ -21,7 +16,15 @@ import { OpenAIKeyPrompt } from '../components/OpenAIKeyPrompt.js';
 import { RadioButtonSelect } from '../components/shared/RadioButtonSelect.js';
 
 interface AuthDialogProps {
-  onSelect: (authMethod: AuthType | undefined, scope: SettingScope) => void;
+  onSelect: (
+    authMethod: AuthType | undefined,
+    scope: SettingScope,
+    credentials?: {
+      apiKey?: string;
+      baseUrl?: string;
+      model?: string;
+    },
+  ) => void;
   settings: LoadedSettings;
   initialErrorMessage?: string | null;
 }
@@ -70,11 +73,7 @@ export function AuthDialog({
         return item.value === defaultAuthType;
       }
 
-      if (process.env['GEMINI_API_KEY']) {
-        return item.value === AuthType.USE_GEMINI;
-      }
-
-      return item.value === AuthType.LOGIN_WITH_GOOGLE;
+      return item.value === AuthType.QWEN_OAUTH;
     }),
   );
 
@@ -101,11 +100,12 @@ export function AuthDialog({
     baseUrl: string,
     model: string,
   ) => {
-    setOpenAIApiKey(apiKey);
-    setOpenAIBaseUrl(baseUrl);
-    setOpenAIModel(model);
     setShowOpenAIKeyPrompt(false);
-    onSelect(AuthType.USE_OPENAI, SettingScope.User);
+    onSelect(AuthType.USE_OPENAI, SettingScope.User, {
+      apiKey,
+      baseUrl,
+      model,
+    });
   };
 
   const handleOpenAIKeyCancel = () => {
diff --git a/packages/cli/src/ui/auth/useAuth.ts b/packages/cli/src/ui/auth/useAuth.ts
index 5cbffff8..e761043d 100644
--- a/packages/cli/src/ui/auth/useAuth.ts
+++ b/packages/cli/src/ui/auth/useAuth.ts
@@ -6,12 +6,11 @@
 
 import { useState, useCallback, useEffect } from 'react';
 import type { LoadedSettings, SettingScope } from '../../config/settings.js';
-import { AuthType, type Config } from '@qwen-code/qwen-code-core';
+import type { AuthType, Config } from '@qwen-code/qwen-code-core';
 import {
   clearCachedCredentialFile,
   getErrorMessage,
 } from '@qwen-code/qwen-code-core';
-import { runExitCleanup } from '../../utils/cleanup.js';
 import { AuthState } from '../types.js';
 import { validateAuthMethod } from '../../config/auth.js';
 
@@ -47,6 +46,7 @@ export const useAuthCommand = (settings: LoadedSettings, config: Config) => {
       setAuthError(error);
       if (error) {
         setAuthState(AuthState.Updating);
+        setIsAuthDialogOpen(true);
       }
     },
     [setAuthError, setAuthState],
@@ -87,24 +87,49 @@ export const useAuthCommand = (settings: LoadedSettings, config: Config) => {
 
   // Handle auth selection from dialog
   const handleAuthSelect = useCallback(
-    async (authType: AuthType | undefined, scope: SettingScope) => {
+    async (
+      authType: AuthType | undefined,
+      scope: SettingScope,
+      credentials?: {
+        apiKey?: string;
+        baseUrl?: string;
+        model?: string;
+      },
+    ) => {
       if (authType) {
         await clearCachedCredentialFile();
 
-        settings.setValue(scope, 'security.auth.selectedType', authType);
+        // Save OpenAI credentials if provided
+        if (credentials) {
+          // Update Config's internal generationConfig before calling refreshAuth
+          // This ensures refreshAuth has access to the new credentials
+          config.updateCredentials({
+            apiKey: credentials.apiKey,
+            baseUrl: credentials.baseUrl,
+            model: credentials.model,
+          });
 
-        if (
-          authType === AuthType.LOGIN_WITH_GOOGLE &&
-          config.isBrowserLaunchSuppressed()
-        ) {
-          await runExitCleanup();
-          console.log(`
-----------------------------------------------------------------
-Logging in with Google... Please restart Gemini CLI to continue.
-----------------------------------------------------------------
-          `);
-          process.exit(0);
+          // Also set environment variables for compatibility with other parts of the code
+          if (credentials.apiKey) {
+            settings.setValue(
+              scope,
+              'security.auth.apiKey',
+              credentials.apiKey,
+            );
+          }
+          if (credentials.baseUrl) {
+            settings.setValue(
+              scope,
+              'security.auth.baseUrl',
+              credentials.baseUrl,
+            );
+          }
+          if (credentials.model) {
+            settings.setValue(scope, 'model.name', credentials.model);
+          }
         }
+
+        settings.setValue(scope, 'security.auth.selectedType', authType);
       }
 
       setIsAuthDialogOpen(false);
diff --git a/packages/cli/src/ui/commands/bugCommand.test.ts b/packages/cli/src/ui/commands/bugCommand.test.ts
index 2a579b67..1cc5da45 100644
--- a/packages/cli/src/ui/commands/bugCommand.test.ts
+++ b/packages/cli/src/ui/commands/bugCommand.test.ts
@@ -11,6 +11,7 @@ import { createMockCommandContext } from '../../test-utils/mockCommandContext.js
 import { getCliVersion } from '../../utils/version.js';
 import { GIT_COMMIT_INFO } from '../../generated/git-commit.js';
 import { formatMemoryUsage } from '../utils/formatters.js';
+import { AuthType } from '@qwen-code/qwen-code-core';
 
 // Mock dependencies
 vi.mock('open');
@@ -59,6 +60,15 @@ describe('bugCommand', () => {
           getBugCommand: () => undefined,
           getIdeMode: () => true,
         },
+        settings: {
+          merged: {
+            security: {
+              auth: {
+                selectedType: undefined,
+              },
+            },
+          },
+        },
       },
     });
 
@@ -71,6 +81,7 @@ describe('bugCommand', () => {
 * **Session ID:** test-session-id
 * **Operating System:** test-platform v20.0.0
 * **Sandbox Environment:** test
+* **Auth Type:** 
 * **Model Version:** qwen3-coder-plus
 * **Memory Usage:** 100 MB
 * **IDE Client:** VSCode
@@ -92,6 +103,15 @@ describe('bugCommand', () => {
           getBugCommand: () => ({ urlTemplate: customTemplate }),
           getIdeMode: () => true,
         },
+        settings: {
+          merged: {
+            security: {
+              auth: {
+                selectedType: undefined,
+              },
+            },
+          },
+        },
       },
     });
 
@@ -104,6 +124,7 @@ describe('bugCommand', () => {
 * **Session ID:** test-session-id
 * **Operating System:** test-platform v20.0.0
 * **Sandbox Environment:** test
+* **Auth Type:** 
 * **Model Version:** qwen3-coder-plus
 * **Memory Usage:** 100 MB
 * **IDE Client:** VSCode
@@ -114,4 +135,49 @@ describe('bugCommand', () => {
 
     expect(open).toHaveBeenCalledWith(expectedUrl);
   });
+
+  it('should include Base URL when auth type is OpenAI', async () => {
+    const mockContext = createMockCommandContext({
+      services: {
+        config: {
+          getModel: () => 'qwen3-coder-plus',
+          getBugCommand: () => undefined,
+          getIdeMode: () => true,
+          getContentGeneratorConfig: () => ({
+            baseUrl: 'https://api.openai.com/v1',
+          }),
+        },
+        settings: {
+          merged: {
+            security: {
+              auth: {
+                selectedType: AuthType.USE_OPENAI,
+              },
+            },
+          },
+        },
+      },
+    });
+
+    if (!bugCommand.action) throw new Error('Action is not defined');
+    await bugCommand.action(mockContext, 'OpenAI bug');
+
+    const expectedInfo = `
+* **CLI Version:** 0.1.0
+* **Git Commit:** ${GIT_COMMIT_INFO}
+* **Session ID:** test-session-id
+* **Operating System:** test-platform v20.0.0
+* **Sandbox Environment:** test
+* **Auth Type:** ${AuthType.USE_OPENAI}
+* **Base URL:** https://api.openai.com/v1
+* **Model Version:** qwen3-coder-plus
+* **Memory Usage:** 100 MB
+* **IDE Client:** VSCode
+`;
+    const expectedUrl =
+      'https://github.com/QwenLM/qwen-code/issues/new?template=bug_report.yml&title=OpenAI%20bug&info=' +
+      encodeURIComponent(expectedInfo);
+
+    expect(open).toHaveBeenCalledWith(expectedUrl);
+  });
 });
diff --git a/packages/cli/src/ui/commands/bugCommand.ts b/packages/cli/src/ui/commands/bugCommand.ts
index 79c56744..4c16f4fb 100644
--- a/packages/cli/src/ui/commands/bugCommand.ts
+++ b/packages/cli/src/ui/commands/bugCommand.ts
@@ -15,7 +15,7 @@ import { MessageType } from '../types.js';
 import { GIT_COMMIT_INFO } from '../../generated/git-commit.js';
 import { formatMemoryUsage } from '../utils/formatters.js';
 import { getCliVersion } from '../../utils/version.js';
-import { IdeClient, sessionId } from '@qwen-code/qwen-code-core';
+import { IdeClient, sessionId, AuthType } from '@qwen-code/qwen-code-core';
 
 export const bugCommand: SlashCommand = {
   name: 'bug',
@@ -38,6 +38,12 @@ export const bugCommand: SlashCommand = {
     const cliVersion = await getCliVersion();
     const memoryUsage = formatMemoryUsage(process.memoryUsage().rss);
     const ideClient = await getIdeClientName(context);
+    const selectedAuthType =
+      context.services.settings.merged.security?.auth?.selectedType || '';
+    const baseUrl =
+      selectedAuthType === AuthType.USE_OPENAI
+        ? config?.getContentGeneratorConfig()?.baseUrl
+        : undefined;
 
     let info = `
 * **CLI Version:** ${cliVersion}
@@ -45,6 +51,11 @@ export const bugCommand: SlashCommand = {
 * **Session ID:** ${sessionId}
 * **Operating System:** ${osVersion}
 * **Sandbox Environment:** ${sandboxEnv}
+* **Auth Type:** ${selectedAuthType}`;
+    if (baseUrl) {
+      info += `\n* **Base URL:** ${baseUrl}`;
+    }
+    info += `
 * **Model Version:** ${modelVersion}
 * **Memory Usage:** ${memoryUsage}
 `;
diff --git a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.test.tsx b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.test.tsx
index b649c366..423b6b28 100644
--- a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.test.tsx
+++ b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.test.tsx
@@ -12,6 +12,7 @@ import type {
   Config,
 } from '@qwen-code/qwen-code-core';
 import { renderWithProviders } from '../../../test-utils/render.js';
+import type { LoadedSettings } from '../../../config/settings.js';
 
 describe('ToolConfirmationMessage', () => {
   const mockConfig = {
@@ -187,4 +188,63 @@ describe('ToolConfirmationMessage', () => {
       });
     });
   });
+
+  describe('external editor option', () => {
+    const editConfirmationDetails: ToolCallConfirmationDetails = {
+      type: 'edit',
+      title: 'Confirm Edit',
+      fileName: 'test.txt',
+      filePath: '/test.txt',
+      fileDiff: '...diff...',
+      originalContent: 'a',
+      newContent: 'b',
+      onConfirm: vi.fn(),
+    };
+
+    it('should show "Modify with external editor" when preferredEditor is set', () => {
+      const mockConfig = {
+        isTrustedFolder: () => true,
+        getIdeMode: () => false,
+      } as unknown as Config;
+
+      const { lastFrame } = renderWithProviders(
+        <ToolConfirmationMessage
+          confirmationDetails={editConfirmationDetails}
+          config={mockConfig}
+          availableTerminalHeight={30}
+          terminalWidth={80}
+        />,
+        {
+          settings: {
+            merged: { general: { preferredEditor: 'vscode' } },
+          } as unknown as LoadedSettings,
+        },
+      );
+
+      expect(lastFrame()).toContain('Modify with external editor');
+    });
+
+    it('should NOT show "Modify with external editor" when preferredEditor is not set', () => {
+      const mockConfig = {
+        isTrustedFolder: () => true,
+        getIdeMode: () => false,
+      } as unknown as Config;
+
+      const { lastFrame } = renderWithProviders(
+        <ToolConfirmationMessage
+          confirmationDetails={editConfirmationDetails}
+          config={mockConfig}
+          availableTerminalHeight={30}
+          terminalWidth={80}
+        />,
+        {
+          settings: {
+            merged: { general: {} },
+          } as unknown as LoadedSettings,
+        },
+      );
+
+      expect(lastFrame()).not.toContain('Modify with external editor');
+    });
+  });
 });
diff --git a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
index 6504dedc..6fea96cb 100644
--- a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
+++ b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
@@ -15,12 +15,14 @@ import type {
   ToolExecuteConfirmationDetails,
   ToolMcpConfirmationDetails,
   Config,
+  EditorType,
 } from '@qwen-code/qwen-code-core';
 import { IdeClient, ToolConfirmationOutcome } from '@qwen-code/qwen-code-core';
 import type { RadioSelectItem } from '../shared/RadioButtonSelect.js';
 import { RadioButtonSelect } from '../shared/RadioButtonSelect.js';
 import { MaxSizedBox } from '../shared/MaxSizedBox.js';
 import { useKeypress } from '../../hooks/useKeypress.js';
+import { useSettings } from '../../contexts/SettingsContext.js';
 import { theme } from '../../semantic-colors.js';
 
 export interface ToolConfirmationMessageProps {
@@ -45,6 +47,11 @@ export const ToolConfirmationMessage: React.FC<
   const { onConfirm } = confirmationDetails;
   const childWidth = terminalWidth - 2; // 2 for padding
 
+  const settings = useSettings();
+  const preferredEditor = settings.merged.general?.preferredEditor as
+    | EditorType
+    | undefined;
+
   const [ideClient, setIdeClient] = useState<IdeClient | null>(null);
   const [isDiffingEnabled, setIsDiffingEnabled] = useState(false);
 
@@ -199,7 +206,7 @@ export const ToolConfirmationMessage: React.FC<
         key: 'Yes, allow always',
       });
     }
-    if (!config.getIdeMode() || !isDiffingEnabled) {
+    if ((!config.getIdeMode() || !isDiffingEnabled) && preferredEditor) {
       options.push({
         label: 'Modify with external editor',
         value: ToolConfirmationOutcome.ModifyWithEditor,
diff --git a/packages/cli/src/ui/hooks/useEditorSettings.test.ts b/packages/cli/src/ui/hooks/useEditorSettings.test.ts
index 6c4a5d74..fa3cf98b 100644
--- a/packages/cli/src/ui/hooks/useEditorSettings.test.ts
+++ b/packages/cli/src/ui/hooks/useEditorSettings.test.ts
@@ -109,7 +109,7 @@ describe('useEditorSettings', () => {
 
     expect(mockLoadedSettings.setValue).toHaveBeenCalledWith(
       scope,
-      'preferredEditor',
+      'general.preferredEditor',
       editorType,
     );
 
@@ -139,7 +139,7 @@ describe('useEditorSettings', () => {
 
     expect(mockLoadedSettings.setValue).toHaveBeenCalledWith(
       scope,
-      'preferredEditor',
+      'general.preferredEditor',
       undefined,
     );
 
@@ -170,7 +170,7 @@ describe('useEditorSettings', () => {
 
       expect(mockLoadedSettings.setValue).toHaveBeenCalledWith(
         scope,
-        'preferredEditor',
+        'general.preferredEditor',
         editorType,
       );
 
@@ -199,7 +199,7 @@ describe('useEditorSettings', () => {
 
       expect(mockLoadedSettings.setValue).toHaveBeenCalledWith(
         scope,
-        'preferredEditor',
+        'general.preferredEditor',
         editorType,
       );
 
diff --git a/packages/cli/src/ui/hooks/useEditorSettings.ts b/packages/cli/src/ui/hooks/useEditorSettings.ts
index 6d7a217c..5d6a5a37 100644
--- a/packages/cli/src/ui/hooks/useEditorSettings.ts
+++ b/packages/cli/src/ui/hooks/useEditorSettings.ts
@@ -45,7 +45,7 @@ export const useEditorSettings = (
       }
 
       try {
-        loadedSettings.setValue(scope, 'preferredEditor', editorType);
+        loadedSettings.setValue(scope, 'general.preferredEditor', editorType);
         addItem(
           {
             type: MessageType.INFO,
diff --git a/packages/cli/src/validateNonInterActiveAuth.test.ts b/packages/cli/src/validateNonInterActiveAuth.test.ts
index c76296a5..dba93e62 100644
--- a/packages/cli/src/validateNonInterActiveAuth.test.ts
+++ b/packages/cli/src/validateNonInterActiveAuth.test.ts
@@ -105,34 +105,6 @@ describe('validateNonInterActiveAuth', () => {
     expect(processExitSpy).toHaveBeenCalledWith(1);
   });
 
-  it('uses LOGIN_WITH_GOOGLE if GOOGLE_GENAI_USE_GCA is set', async () => {
-    process.env['GOOGLE_GENAI_USE_GCA'] = 'true';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.LOGIN_WITH_GOOGLE);
-  });
-
-  it('uses USE_GEMINI if GEMINI_API_KEY is set', async () => {
-    process.env['GEMINI_API_KEY'] = 'fake-key';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_GEMINI);
-  });
-
   it('uses USE_OPENAI if OPENAI_API_KEY is set', async () => {
     process.env['OPENAI_API_KEY'] = 'fake-openai-key';
     const nonInteractiveConfig = {
@@ -168,104 +140,6 @@ describe('validateNonInterActiveAuth', () => {
     expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.QWEN_OAUTH);
   });
 
-  it('uses USE_VERTEX_AI if GOOGLE_GENAI_USE_VERTEXAI is true (with GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION)', async () => {
-    process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'true';
-    process.env['GOOGLE_CLOUD_PROJECT'] = 'test-project';
-    process.env['GOOGLE_CLOUD_LOCATION'] = 'us-central1';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_VERTEX_AI);
-  });
-
-  it('uses USE_VERTEX_AI if GOOGLE_GENAI_USE_VERTEXAI is true and GOOGLE_API_KEY is set', async () => {
-    process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'true';
-    process.env['GOOGLE_API_KEY'] = 'vertex-api-key';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_VERTEX_AI);
-  });
-
-  it('uses LOGIN_WITH_GOOGLE if GOOGLE_GENAI_USE_GCA is set, even with other env vars', async () => {
-    process.env['GOOGLE_GENAI_USE_GCA'] = 'true';
-    process.env['GEMINI_API_KEY'] = 'fake-key';
-    process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'true';
-    process.env['GOOGLE_CLOUD_PROJECT'] = 'test-project';
-    process.env['GOOGLE_CLOUD_LOCATION'] = 'us-central1';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.LOGIN_WITH_GOOGLE);
-  });
-
-  it('uses USE_VERTEX_AI if both GEMINI_API_KEY and GOOGLE_GENAI_USE_VERTEXAI are set', async () => {
-    process.env['GEMINI_API_KEY'] = 'fake-key';
-    process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'true';
-    process.env['GOOGLE_CLOUD_PROJECT'] = 'test-project';
-    process.env['GOOGLE_CLOUD_LOCATION'] = 'us-central1';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_VERTEX_AI);
-  });
-
-  it('uses USE_GEMINI if GOOGLE_GENAI_USE_VERTEXAI is false, GEMINI_API_KEY is set, and project/location are available', async () => {
-    process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'false';
-    process.env['GEMINI_API_KEY'] = 'fake-key';
-    process.env['GOOGLE_CLOUD_PROJECT'] = 'test-project';
-    process.env['GOOGLE_CLOUD_LOCATION'] = 'us-central1';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      undefined,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_GEMINI);
-  });
-
-  it('uses configuredAuthType if provided', async () => {
-    // Set required env var for USE_GEMINI
-    process.env['GEMINI_API_KEY'] = 'fake-key';
-    const nonInteractiveConfig = {
-      refreshAuth: refreshAuthMock,
-    } as unknown as Config;
-    await validateNonInteractiveAuth(
-      AuthType.USE_GEMINI,
-      undefined,
-      nonInteractiveConfig,
-      mockSettings,
-    );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_GEMINI);
-  });
-
   it('exits if validateAuthMethod returns error', async () => {
     // Mock validateAuthMethod to return error
     vi.spyOn(auth, 'validateAuthMethod').mockReturnValue('Auth error!');
@@ -317,26 +191,25 @@ describe('validateNonInterActiveAuth', () => {
   });
 
   it('uses enforcedAuthType if provided', async () => {
-    mockSettings.merged.security!.auth!.enforcedType = AuthType.USE_GEMINI;
-    mockSettings.merged.security!.auth!.selectedType = AuthType.USE_GEMINI;
-    // Set required env var for USE_GEMINI to ensure enforcedAuthType takes precedence
-    process.env['GEMINI_API_KEY'] = 'fake-key';
+    mockSettings.merged.security!.auth!.enforcedType = AuthType.USE_OPENAI;
+    mockSettings.merged.security!.auth!.selectedType = AuthType.USE_OPENAI;
+    // Set required env var for USE_OPENAI to ensure enforcedAuthType takes precedence
+    process.env['OPENAI_API_KEY'] = 'fake-key';
     const nonInteractiveConfig = {
       refreshAuth: refreshAuthMock,
     } as unknown as Config;
     await validateNonInteractiveAuth(
-      AuthType.USE_GEMINI,
+      AuthType.USE_OPENAI,
       undefined,
       nonInteractiveConfig,
       mockSettings,
     );
-    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_GEMINI);
+    expect(refreshAuthMock).toHaveBeenCalledWith(AuthType.USE_OPENAI);
   });
 
   it('exits if currentAuthType does not match enforcedAuthType', async () => {
-    mockSettings.merged.security!.auth!.enforcedType =
-      AuthType.LOGIN_WITH_GOOGLE;
-    process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'true';
+    mockSettings.merged.security!.auth!.enforcedType = AuthType.QWEN_OAUTH;
+    process.env['OPENAI_API_KEY'] = 'fake-key';
     const nonInteractiveConfig = {
       refreshAuth: refreshAuthMock,
       getOutputFormat: vi.fn().mockReturnValue(OutputFormat.TEXT),
@@ -346,7 +219,7 @@ describe('validateNonInterActiveAuth', () => {
     } as unknown as Config;
     try {
       await validateNonInteractiveAuth(
-        AuthType.USE_GEMINI,
+        AuthType.USE_OPENAI,
         undefined,
         nonInteractiveConfig,
         mockSettings,
@@ -356,7 +229,7 @@ describe('validateNonInterActiveAuth', () => {
       expect((e as Error).message).toContain('process.exit(1) called');
     }
     expect(consoleErrorSpy).toHaveBeenCalledWith(
-      'The configured auth type is oauth-personal, but the current auth type is vertex-ai. Please re-authenticate with the correct type.',
+      'The configured auth type is qwen-oauth, but the current auth type is openai. Please re-authenticate with the correct type.',
     );
     expect(processExitSpy).toHaveBeenCalledWith(1);
   });
@@ -394,8 +267,8 @@ describe('validateNonInterActiveAuth', () => {
     });
 
     it('prints JSON error when enforced auth mismatches current auth and exits with code 1', async () => {
-      mockSettings.merged.security!.auth!.enforcedType = AuthType.USE_GEMINI;
-      process.env['GOOGLE_GENAI_USE_GCA'] = 'true';
+      mockSettings.merged.security!.auth!.enforcedType = AuthType.QWEN_OAUTH;
+      process.env['OPENAI_API_KEY'] = 'fake-key';
 
       const nonInteractiveConfig = {
         refreshAuth: refreshAuthMock,
@@ -424,14 +297,14 @@ describe('validateNonInterActiveAuth', () => {
         expect(payload.error.type).toBe('Error');
         expect(payload.error.code).toBe(1);
         expect(payload.error.message).toContain(
-          'The configured auth type is gemini-api-key, but the current auth type is oauth-personal.',
+          'The configured auth type is qwen-oauth, but the current auth type is openai.',
         );
       }
     });
 
     it('prints JSON error when validateAuthMethod fails and exits with code 1', async () => {
       vi.spyOn(auth, 'validateAuthMethod').mockReturnValue('Auth error!');
-      process.env['GEMINI_API_KEY'] = 'fake-key';
+      process.env['OPENAI_API_KEY'] = 'fake-key';
 
       const nonInteractiveConfig = {
         refreshAuth: refreshAuthMock,
@@ -444,7 +317,7 @@ describe('validateNonInterActiveAuth', () => {
       let thrown: Error | undefined;
       try {
         await validateNonInteractiveAuth(
-          AuthType.USE_GEMINI,
+          AuthType.USE_OPENAI,
           undefined,
           nonInteractiveConfig,
           mockSettings,
diff --git a/packages/cli/src/validateNonInterActiveAuth.ts b/packages/cli/src/validateNonInterActiveAuth.ts
index ab1675b9..e44cd0a4 100644
--- a/packages/cli/src/validateNonInterActiveAuth.ts
+++ b/packages/cli/src/validateNonInterActiveAuth.ts
@@ -12,21 +12,13 @@ import { type LoadedSettings } from './config/settings.js';
 import { handleError } from './utils/errors.js';
 
 function getAuthTypeFromEnv(): AuthType | undefined {
-  if (process.env['GOOGLE_GENAI_USE_GCA'] === 'true') {
-    return AuthType.LOGIN_WITH_GOOGLE;
-  }
-  if (process.env['GOOGLE_GENAI_USE_VERTEXAI'] === 'true') {
-    return AuthType.USE_VERTEX_AI;
-  }
-  if (process.env['GEMINI_API_KEY']) {
-    return AuthType.USE_GEMINI;
-  }
   if (process.env['OPENAI_API_KEY']) {
     return AuthType.USE_OPENAI;
   }
   if (process.env['QWEN_OAUTH']) {
     return AuthType.QWEN_OAUTH;
   }
+
   return undefined;
 }
 
diff --git a/packages/core/src/config/config.test.ts b/packages/core/src/config/config.test.ts
index 2f908f0c..42442632 100644
--- a/packages/core/src/config/config.test.ts
+++ b/packages/core/src/config/config.test.ts
@@ -16,6 +16,7 @@ import {
   QwenLogger,
 } from '../telemetry/index.js';
 import type { ContentGeneratorConfig } from '../core/contentGenerator.js';
+import { DEFAULT_DASHSCOPE_BASE_URL } from '../core/openaiContentGenerator/constants.js';
 import {
   AuthType,
   createContentGeneratorConfig,
@@ -250,6 +251,7 @@ describe('Server Config (config.ts)', () => {
         authType,
         {
           model: MODEL,
+          baseUrl: DEFAULT_DASHSCOPE_BASE_URL,
         },
       );
       // Verify that contentGeneratorConfig is updated
diff --git a/packages/core/src/config/config.ts b/packages/core/src/config/config.ts
index 6ac472f1..44878bad 100644
--- a/packages/core/src/config/config.ts
+++ b/packages/core/src/config/config.ts
@@ -88,8 +88,9 @@ import {
   DEFAULT_FILE_FILTERING_OPTIONS,
   DEFAULT_MEMORY_FILE_FILTERING_OPTIONS,
 } from './constants.js';
-import { DEFAULT_QWEN_EMBEDDING_MODEL } from './models.js';
+import { DEFAULT_QWEN_EMBEDDING_MODEL, DEFAULT_QWEN_MODEL } from './models.js';
 import { Storage } from './storage.js';
+import { DEFAULT_DASHSCOPE_BASE_URL } from '../core/openaiContentGenerator/constants.js';
 
 // Re-export types
 export type { AnyToolInvocation, FileFilteringOptions, MCPOAuthConfig };
@@ -243,7 +244,7 @@ export interface ConfigParameters {
   fileDiscoveryService?: FileDiscoveryService;
   includeDirectories?: string[];
   bugCommand?: BugCommandSettings;
-  model: string;
+  model?: string;
   extensionContextFilePaths?: string[];
   maxSessionTurns?: number;
   sessionTokenLimit?: number;
@@ -289,7 +290,7 @@ export class Config {
   private fileSystemService: FileSystemService;
   private contentGeneratorConfig!: ContentGeneratorConfig;
   private contentGenerator!: ContentGenerator;
-  private readonly _generationConfig: ContentGeneratorConfig;
+  private _generationConfig: Partial<ContentGeneratorConfig>;
   private readonly embeddingModel: string;
   private readonly sandbox: SandboxConfig | undefined;
   private readonly targetDir: string;
@@ -440,8 +441,10 @@ export class Config {
     this._generationConfig = {
       model: params.model,
       ...(params.generationConfig || {}),
+      baseUrl: params.generationConfig?.baseUrl || DEFAULT_DASHSCOPE_BASE_URL,
     };
-    this.contentGeneratorConfig = this._generationConfig;
+    this.contentGeneratorConfig = this
+      ._generationConfig as ContentGeneratorConfig;
     this.cliVersion = params.cliVersion;
 
     this.loadMemoryFromIncludeDirectories =
@@ -520,6 +523,26 @@ export class Config {
     return this.contentGenerator;
   }
 
+  /**
+   * Updates the credentials in the generation config.
+   * This is needed when credentials are set after Config construction.
+   */
+  updateCredentials(credentials: {
+    apiKey?: string;
+    baseUrl?: string;
+    model?: string;
+  }): void {
+    if (credentials.apiKey) {
+      this._generationConfig.apiKey = credentials.apiKey;
+    }
+    if (credentials.baseUrl) {
+      this._generationConfig.baseUrl = credentials.baseUrl;
+    }
+    if (credentials.model) {
+      this._generationConfig.model = credentials.model;
+    }
+  }
+
   async refreshAuth(authMethod: AuthType) {
     // Vertex and Genai have incompatible encryption and sending history with
     // throughtSignature from Genai to Vertex will fail, we need to strip them
@@ -587,7 +610,7 @@ export class Config {
   }
 
   getModel(): string {
-    return this.contentGeneratorConfig.model;
+    return this.contentGeneratorConfig?.model || DEFAULT_QWEN_MODEL;
   }
 
   async setModel(
diff --git a/packages/core/src/core/contentGenerator.test.ts b/packages/core/src/core/contentGenerator.test.ts
index 98df2d79..729481c0 100644
--- a/packages/core/src/core/contentGenerator.test.ts
+++ b/packages/core/src/core/contentGenerator.test.ts
@@ -4,13 +4,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { describe, it, expect, vi } from 'vitest';
 import type { ContentGenerator } from './contentGenerator.js';
-import {
-  createContentGenerator,
-  AuthType,
-  createContentGeneratorConfig,
-} from './contentGenerator.js';
+import { createContentGenerator, AuthType } from './contentGenerator.js';
 import { createCodeAssistContentGenerator } from '../code_assist/codeAssist.js';
 import { GoogleGenAI } from '@google/genai';
 import type { Config } from '../config/config.js';
@@ -110,83 +106,3 @@ describe('createContentGenerator', () => {
     );
   });
 });
-
-describe('createContentGeneratorConfig', () => {
-  const mockConfig = {
-    getModel: vi.fn().mockReturnValue('gemini-pro'),
-    setModel: vi.fn(),
-    flashFallbackHandler: vi.fn(),
-    getProxy: vi.fn(),
-    getEnableOpenAILogging: vi.fn().mockReturnValue(false),
-    getSamplingParams: vi.fn().mockReturnValue(undefined),
-    getContentGeneratorTimeout: vi.fn().mockReturnValue(undefined),
-    getContentGeneratorMaxRetries: vi.fn().mockReturnValue(undefined),
-    getContentGeneratorDisableCacheControl: vi.fn().mockReturnValue(undefined),
-    getContentGeneratorSamplingParams: vi.fn().mockReturnValue(undefined),
-    getCliVersion: vi.fn().mockReturnValue('1.0.0'),
-  } as unknown as Config;
-
-  beforeEach(() => {
-    // Reset modules to re-evaluate imports and environment variables
-    vi.resetModules();
-    vi.clearAllMocks();
-  });
-
-  afterEach(() => {
-    vi.unstubAllEnvs();
-  });
-
-  it('should configure for Gemini using GEMINI_API_KEY when set', async () => {
-    vi.stubEnv('GEMINI_API_KEY', 'env-gemini-key');
-    const config = await createContentGeneratorConfig(
-      mockConfig,
-      AuthType.USE_GEMINI,
-    );
-    expect(config.apiKey).toBe('env-gemini-key');
-    expect(config.vertexai).toBe(false);
-  });
-
-  it('should not configure for Gemini if GEMINI_API_KEY is empty', async () => {
-    vi.stubEnv('GEMINI_API_KEY', '');
-    const config = await createContentGeneratorConfig(
-      mockConfig,
-      AuthType.USE_GEMINI,
-    );
-    expect(config.apiKey).toBeUndefined();
-    expect(config.vertexai).toBeUndefined();
-  });
-
-  it('should configure for Vertex AI using GOOGLE_API_KEY when set', async () => {
-    vi.stubEnv('GOOGLE_API_KEY', 'env-google-key');
-    const config = await createContentGeneratorConfig(
-      mockConfig,
-      AuthType.USE_VERTEX_AI,
-    );
-    expect(config.apiKey).toBe('env-google-key');
-    expect(config.vertexai).toBe(true);
-  });
-
-  it('should configure for Vertex AI using GCP project and location when set', async () => {
-    vi.stubEnv('GOOGLE_API_KEY', undefined);
-    vi.stubEnv('GOOGLE_CLOUD_PROJECT', 'env-gcp-project');
-    vi.stubEnv('GOOGLE_CLOUD_LOCATION', 'env-gcp-location');
-    const config = await createContentGeneratorConfig(
-      mockConfig,
-      AuthType.USE_VERTEX_AI,
-    );
-    expect(config.vertexai).toBe(true);
-    expect(config.apiKey).toBeUndefined();
-  });
-
-  it('should not configure for Vertex AI if required env vars are empty', async () => {
-    vi.stubEnv('GOOGLE_API_KEY', '');
-    vi.stubEnv('GOOGLE_CLOUD_PROJECT', '');
-    vi.stubEnv('GOOGLE_CLOUD_LOCATION', '');
-    const config = await createContentGeneratorConfig(
-      mockConfig,
-      AuthType.USE_VERTEX_AI,
-    );
-    expect(config.apiKey).toBeUndefined();
-    expect(config.vertexai).toBeUndefined();
-  });
-});
diff --git a/packages/core/src/core/contentGenerator.ts b/packages/core/src/core/contentGenerator.ts
index 2d3c1949..3258cd5c 100644
--- a/packages/core/src/core/contentGenerator.ts
+++ b/packages/core/src/core/contentGenerator.ts
@@ -14,8 +14,8 @@ import type {
 } from '@google/genai';
 import { GoogleGenAI } from '@google/genai';
 import { createCodeAssistContentGenerator } from '../code_assist/codeAssist.js';
-import type { Config } from '../config/config.js';
 import { DEFAULT_QWEN_MODEL } from '../config/models.js';
+import type { Config } from '../config/config.js';
 
 import type { UserTierId } from '../code_assist/types.js';
 import { InstallationManager } from '../utils/installationManager.js';
@@ -82,53 +82,37 @@ export function createContentGeneratorConfig(
   authType: AuthType | undefined,
   generationConfig?: Partial<ContentGeneratorConfig>,
 ): ContentGeneratorConfig {
-  const geminiApiKey = process.env['GEMINI_API_KEY'] || undefined;
-  const googleApiKey = process.env['GOOGLE_API_KEY'] || undefined;
-  const googleCloudProject = process.env['GOOGLE_CLOUD_PROJECT'] || undefined;
-  const googleCloudLocation = process.env['GOOGLE_CLOUD_LOCATION'] || undefined;
-
-  const newContentGeneratorConfig: ContentGeneratorConfig = {
+  const newContentGeneratorConfig: Partial<ContentGeneratorConfig> = {
     ...(generationConfig || {}),
-    model: generationConfig?.model || DEFAULT_QWEN_MODEL,
     authType,
     proxy: config?.getProxy(),
   };
 
-  // If we are using Google auth or we are in Cloud Shell, there is nothing else to validate for now
-  if (
-    authType === AuthType.LOGIN_WITH_GOOGLE ||
-    authType === AuthType.CLOUD_SHELL
-  ) {
-    return newContentGeneratorConfig;
-  }
-
-  if (authType === AuthType.USE_GEMINI && geminiApiKey) {
-    newContentGeneratorConfig.apiKey = geminiApiKey;
-    newContentGeneratorConfig.vertexai = false;
-
-    return newContentGeneratorConfig;
-  }
-
-  if (
-    authType === AuthType.USE_VERTEX_AI &&
-    (googleApiKey || (googleCloudProject && googleCloudLocation))
-  ) {
-    newContentGeneratorConfig.apiKey = googleApiKey;
-    newContentGeneratorConfig.vertexai = true;
-
-    return newContentGeneratorConfig;
-  }
-
   if (authType === AuthType.QWEN_OAUTH) {
     // For Qwen OAuth, we'll handle the API key dynamically in createContentGenerator
     // Set a special marker to indicate this is Qwen OAuth
-    newContentGeneratorConfig.apiKey = 'QWEN_OAUTH_DYNAMIC_TOKEN';
-    newContentGeneratorConfig.model = DEFAULT_QWEN_MODEL;
-
-    return newContentGeneratorConfig;
+    return {
+      ...newContentGeneratorConfig,
+      model: DEFAULT_QWEN_MODEL,
+      apiKey: 'QWEN_OAUTH_DYNAMIC_TOKEN',
+    } as ContentGeneratorConfig;
   }
 
-  return newContentGeneratorConfig;
+  if (authType === AuthType.USE_OPENAI) {
+    if (!newContentGeneratorConfig.apiKey) {
+      throw new Error('OpenAI API key is required');
+    }
+
+    return {
+      ...newContentGeneratorConfig,
+      model: newContentGeneratorConfig?.model || 'qwen3-coder-plus',
+    } as ContentGeneratorConfig;
+  }
+
+  return {
+    ...newContentGeneratorConfig,
+    model: newContentGeneratorConfig?.model || DEFAULT_QWEN_MODEL,
+  } as ContentGeneratorConfig;
 }
 
 export async function createContentGenerator(
diff --git a/packages/core/src/core/openaiContentGenerator/constants.ts b/packages/core/src/core/openaiContentGenerator/constants.ts
index d2b5ce81..c213d643 100644
--- a/packages/core/src/core/openaiContentGenerator/constants.ts
+++ b/packages/core/src/core/openaiContentGenerator/constants.ts
@@ -1,2 +1,8 @@
 export const DEFAULT_TIMEOUT = 120000;
 export const DEFAULT_MAX_RETRIES = 3;
+
+export const DEFAULT_OPENAI_BASE_URL = 'https://api.openai.com/v1';
+export const DEFAULT_DASHSCOPE_BASE_URL =
+  'https://dashscope.aliyuncs.com/compatible-mode/v1';
+export const DEFAULT_DEEPSEEK_BASE_URL = 'https://api.deepseek.com/v1';
+export const DEFAULT_OPEN_ROUTER_BASE_URL = 'https://openrouter.ai/api/v1';
diff --git a/packages/core/src/core/openaiContentGenerator/provider/dashscope.ts b/packages/core/src/core/openaiContentGenerator/provider/dashscope.ts
index 9130238f..2df72221 100644
--- a/packages/core/src/core/openaiContentGenerator/provider/dashscope.ts
+++ b/packages/core/src/core/openaiContentGenerator/provider/dashscope.ts
@@ -2,7 +2,11 @@ import OpenAI from 'openai';
 import type { Config } from '../../../config/config.js';
 import type { ContentGeneratorConfig } from '../../contentGenerator.js';
 import { AuthType } from '../../contentGenerator.js';
-import { DEFAULT_TIMEOUT, DEFAULT_MAX_RETRIES } from '../constants.js';
+import {
+  DEFAULT_TIMEOUT,
+  DEFAULT_MAX_RETRIES,
+  DEFAULT_DASHSCOPE_BASE_URL,
+} from '../constants.js';
 import { tokenLimit } from '../../tokenLimits.js';
 import type {
   OpenAICompatibleProvider,
@@ -53,7 +57,7 @@ export class DashScopeOpenAICompatibleProvider
   buildClient(): OpenAI {
     const {
       apiKey,
-      baseUrl,
+      baseUrl = DEFAULT_DASHSCOPE_BASE_URL,
       timeout = DEFAULT_TIMEOUT,
       maxRetries = DEFAULT_MAX_RETRIES,
     } = this.contentGeneratorConfig;
diff --git a/packages/core/src/qwen/qwenContentGenerator.ts b/packages/core/src/qwen/qwenContentGenerator.ts
index 0e3ca12e..0b0e249f 100644
--- a/packages/core/src/qwen/qwenContentGenerator.ts
+++ b/packages/core/src/qwen/qwenContentGenerator.ts
@@ -8,7 +8,7 @@ import { OpenAIContentGenerator } from '../core/openaiContentGenerator/index.js'
 import { DashScopeOpenAICompatibleProvider } from '../core/openaiContentGenerator/provider/dashscope.js';
 import type { IQwenOAuth2Client } from './qwenOAuth2.js';
 import { SharedTokenManager } from './sharedTokenManager.js';
-import type { Config } from '../config/config.js';
+import { type Config } from '../config/config.js';
 import type {
   GenerateContentParameters,
   GenerateContentResponse,
@@ -18,10 +18,7 @@ import type {
   EmbedContentResponse,
 } from '@google/genai';
 import type { ContentGeneratorConfig } from '../core/contentGenerator.js';
-
-// Default fallback base URL if no endpoint is provided
-const DEFAULT_QWEN_BASE_URL =
-  'https://dashscope.aliyuncs.com/compatible-mode/v1';
+import { DEFAULT_DASHSCOPE_BASE_URL } from '../core/openaiContentGenerator/constants.js';
 
 /**
  * Qwen Content Generator that uses Qwen OAuth tokens with automatic refresh
@@ -58,7 +55,7 @@ export class QwenContentGenerator extends OpenAIContentGenerator {
    * Get the current endpoint URL with proper protocol and /v1 suffix
    */
   private getCurrentEndpoint(resourceUrl?: string): string {
-    const baseEndpoint = resourceUrl || DEFAULT_QWEN_BASE_URL;
+    const baseEndpoint = resourceUrl || DEFAULT_DASHSCOPE_BASE_URL;
     const suffix = '/v1';
 
     // Normalize the URL: add protocol if missing, ensure /v1 suffix
diff --git a/packages/core/src/utils/editor.test.ts b/packages/core/src/utils/editor.test.ts
index db721240..acc9e1a1 100644
--- a/packages/core/src/utils/editor.test.ts
+++ b/packages/core/src/utils/editor.test.ts
@@ -339,6 +339,7 @@ describe('editor utils', () => {
           diffCommand.args,
           {
             stdio: 'inherit',
+            shell: process.platform === 'win32',
           },
         );
         expect(mockSpawnOn).toHaveBeenCalledWith('close', expect.any(Function));
diff --git a/packages/core/src/utils/editor.ts b/packages/core/src/utils/editor.ts
index 8b507926..1023abe4 100644
--- a/packages/core/src/utils/editor.ts
+++ b/packages/core/src/utils/editor.ts
@@ -195,6 +195,7 @@ export async function openDiff(
     return new Promise<void>((resolve, reject) => {
       const childProcess = spawn(diffCommand.command, diffCommand.args, {
         stdio: 'inherit',
+        shell: process.platform === 'win32',
       });
 
       childProcess.on('close', (code) => {