diff --git a/apps/web/src/app/api/internal/code-review-status/[reviewId]/route.test.ts b/apps/web/src/app/api/internal/code-review-status/[reviewId]/route.test.ts
index cb41737a08..05ebde1ad1 100644
--- a/apps/web/src/app/api/internal/code-review-status/[reviewId]/route.test.ts
+++ b/apps/web/src/app/api/internal/code-review-status/[reviewId]/route.test.ts
@@ -534,6 +534,102 @@ describe('POST /api/internal/code-review-status/[reviewId]', () => {
       );
     });
 
+    it('infers selected-model-unavailable callbacks as action-required failures', async () => {
+      const errorMessage =
+        'prepareSession failed (400): {"error":{"message":"Selected model is not available for this cloud agent session","code":-32600,"data":{"code":"BAD_REQUEST","httpStatus":400,"path":"prepareSession"}}}';
+      mockGetCodeReviewById.mockResolvedValue(makeReview());
+
+      const response = await POST(
+        makeRequest({
+          status: 'failed',
+          errorMessage,
+        }),
+        makeParams(REVIEW_ID)
+      );
+
+      expect(response.status).toBe(200);
+      expect(mockUpdateCodeReviewAttemptForCallback).toHaveBeenCalledWith(
+        expect.objectContaining({
+          status: 'failed',
+          errorMessage,
+          terminalReason: 'selected_model_unavailable',
+        })
+      );
+      expect(mockUpdateCodeReviewStatus).toHaveBeenCalledWith(
+        REVIEW_ID,
+        'failed',
+        expect.objectContaining({
+          errorMessage,
+          terminalReason: 'selected_model_unavailable',
+        })
+      );
+      expect(mockUpdateCodeReviewStatusIfNonTerminal).not.toHaveBeenCalled();
+      expect(mockCreateInfraRetryAttemptIfMissing).not.toHaveBeenCalled();
+      expect(mockRetryReviewFresh).not.toHaveBeenCalled();
+      expect(mockDisableCodeReviewForActionRequiredFailure).toHaveBeenCalledWith(
+        expect.objectContaining({
+          owner: { type: 'user', id: 'user-1', userId: 'user-1' },
+          platform: 'github',
+          reviewId: REVIEW_ID,
+          reason: 'selected_model_unavailable',
+          errorMessage,
+        })
+      );
+      expect(mockUpdateCheckRun).toHaveBeenCalledWith(
+        'inst-1',
+        'owner',
+        'repo',
+        12345,
+        expect.objectContaining({
+          conclusion: 'action_required',
+          output: expect.objectContaining({ title: 'Selected model unavailable' }),
+        }),
+        'standard'
+      );
+      expect(mockFindKiloReviewComment).not.toHaveBeenCalled();
+    });
+
+    it('infers model-not-allowed callbacks as action-required failures', async () => {
+      const errorMessage =
+        'prepareSession failed (400): {"error":{"message":"Not Found: The requested model is not allowed for your team.","code":-32600,"data":{"code":"BAD_REQUEST","httpStatus":400,"path":"prepareSession"}}}';
+      mockGetCodeReviewById.mockResolvedValue(makeReview());
+
+      const response = await POST(
+        makeRequest({
+          status: 'failed',
+          errorMessage,
+        }),
+        makeParams(REVIEW_ID)
+      );
+
+      expect(response.status).toBe(200);
+      expect(mockUpdateCodeReviewStatus).toHaveBeenCalledWith(
+        REVIEW_ID,
+        'failed',
+        expect.objectContaining({
+          errorMessage,
+          terminalReason: 'selected_model_unavailable',
+        })
+      );
+      expect(mockDisableCodeReviewForActionRequiredFailure).toHaveBeenCalledWith(
+        expect.objectContaining({
+          reason: 'selected_model_unavailable',
+          errorMessage,
+        })
+      );
+      expect(mockUpdateCheckRun).toHaveBeenCalledWith(
+        'inst-1',
+        'owner',
+        'repo',
+        12345,
+        expect.objectContaining({
+          conclusion: 'action_required',
+          output: expect.objectContaining({ title: 'Selected model unavailable' }),
+        }),
+        'standard'
+      );
+    });
+
     it('infers GitHub installation and IP allow-list callback failures', async () => {
       mockGetCodeReviewById.mockResolvedValue(makeReview());
 
diff --git a/apps/web/src/lib/code-reviews/action-required-shared.ts b/apps/web/src/lib/code-reviews/action-required-shared.ts
index 2940d53833..aae542053c 100644
--- a/apps/web/src/lib/code-reviews/action-required-shared.ts
+++ b/apps/web/src/lib/code-reviews/action-required-shared.ts
@@ -4,6 +4,7 @@ export const CODE_REVIEW_ACTION_REQUIRED_REASONS = [
   'github_installation_required',
   'github_ip_allow_list',
   'byok_invalid_key',
+  'selected_model_unavailable',
 ] as const;
 
 export type CodeReviewActionRequiredReason = (typeof CODE_REVIEW_ACTION_REQUIRED_REASONS)[number];
@@ -61,6 +62,17 @@ const COPY_BY_REASON = {
       'Code Reviewer was disabled because the selected BYOK API key is invalid or has been revoked. Update the key or choose another model, then enable Code Reviewer again.',
     gitlabDescription: 'BYOK API key needs attention for Code Reviewer',
   },
+  selected_model_unavailable: {
+    title: 'Code Reviewer needs attention',
+    description:
+      'Code Reviewer was disabled because the selected model is not available for cloud agent sessions. Choose an available model, then enable Code Reviewer again.',
+    recoveryLabel: 'Update Code Reviewer settings',
+    emailReason: 'The selected model is not available for cloud agent sessions.',
+    checkTitle: 'Selected model unavailable',
+    checkSummary:
+      'Code Reviewer was disabled because the selected model is not available for cloud agent sessions. Choose an available model, then enable Code Reviewer again.',
+    gitlabDescription: 'Selected model unavailable for Code Reviewer',
+  },
 } satisfies Record<CodeReviewActionRequiredReason, CodeReviewActionRequiredCopy>;
 
 const ACTION_REQUIRED_REASON_SET = new Set<string>(CODE_REVIEW_ACTION_REQUIRED_REASONS);
@@ -91,5 +103,9 @@ export function getCodeReviewActionRequiredRecoveryHref(
     return 'mailto:hi@kilocode.ai?subject=GitHub%20IP%20allow%20list%20for%20Code%20Reviewer';
   }
 
+  if (reason === 'selected_model_unavailable') {
+    return organizationId ? `/organizations/${organizationId}/code-reviews` : '/code-reviews';
+  }
+
   return organizationId ? `/organizations/${organizationId}/byok` : '/byok';
 }
diff --git a/apps/web/src/lib/code-reviews/action-required.test.ts b/apps/web/src/lib/code-reviews/action-required.test.ts
index 09a678e8d1..14b2633fcd 100644
--- a/apps/web/src/lib/code-reviews/action-required.test.ts
+++ b/apps/web/src/lib/code-reviews/action-required.test.ts
@@ -11,11 +11,12 @@ import { and, eq } from 'drizzle-orm';
 import {
   classifyCodeReviewActionRequiredFailure,
   disableCodeReviewForActionRequiredFailure,
+  getCodeReviewActionRequiredRecoveryHref,
   getCodeReviewActionRequiredState,
 } from './action-required';
 
 describe('classifyCodeReviewActionRequiredFailure', () => {
-  it('classifies GitHub installation, GitHub IP allow-list, and BYOK invalid key failures', () => {
+  it('classifies GitHub installation, GitHub IP allow-list, BYOK invalid key, and selected model failures', () => {
     expect(
       classifyCodeReviewActionRequiredFailure(
         'GitHub token or active app installation required for this repository (no_installation_found)'
@@ -39,6 +40,30 @@ describe('classifyCodeReviewActionRequiredFailure', () => {
         'Although you appear to have the correct authorization credentials, the `acme` organization has an IP allow list enabled, and 192.0.2.1 is not permitted.'
       )
     ).toBe('github_ip_allow_list');
+
+    expect(
+      classifyCodeReviewActionRequiredFailure(
+        'Selected model is not available for this cloud agent session'
+      )
+    ).toBe('selected_model_unavailable');
+
+    expect(
+      classifyCodeReviewActionRequiredFailure(
+        'prepareSession failed (400): {"error":{"message":"Selected model is not available for this cloud agent session","code":-32600,"data":{"code":"BAD_REQUEST","httpStatus":400,"path":"prepareSession"}}}'
+      )
+    ).toBe('selected_model_unavailable');
+
+    expect(
+      classifyCodeReviewActionRequiredFailure(
+        'Not Found: The requested model is not allowed for your team.'
+      )
+    ).toBe('selected_model_unavailable');
+
+    expect(
+      classifyCodeReviewActionRequiredFailure(
+        'prepareSession failed (400): {"error":{"message":"Not Found: The requested model is not allowed for your team.","code":-32600,"data":{"code":"BAD_REQUEST","httpStatus":400,"path":"prepareSession"}}}'
+      )
+    ).toBe('selected_model_unavailable');
   });
 
   it('does not classify unrelated auth, rate-limit, or BYOK quota failures', () => {
@@ -49,6 +74,15 @@ describe('classifyCodeReviewActionRequiredFailure', () => {
       classifyCodeReviewActionRequiredFailure('[BYOK] Your account quota is exhausted.')
     ).toBeNull();
   });
+
+  it('routes selected model recovery to Code Reviewer settings', () => {
+    expect(getCodeReviewActionRequiredRecoveryHref('selected_model_unavailable')).toBe(
+      '/code-reviews'
+    );
+    expect(getCodeReviewActionRequiredRecoveryHref('selected_model_unavailable', 'org-1')).toBe(
+      '/organizations/org-1/code-reviews'
+    );
+  });
 });
 
 describe('disableCodeReviewForActionRequiredFailure', () => {
diff --git a/apps/web/src/lib/code-reviews/action-required.ts b/apps/web/src/lib/code-reviews/action-required.ts
index 72cf213687..c3da23be97 100644
--- a/apps/web/src/lib/code-reviews/action-required.ts
+++ b/apps/web/src/lib/code-reviews/action-required.ts
@@ -36,6 +36,11 @@ const CodeReviewActionRequiredStateSchema = z.object({
   emailSentAt: z.string().optional(),
 });
 
+const SELECTED_MODEL_UNAVAILABLE_MESSAGE =
+  'selected model is not available for this cloud agent session';
+const REQUESTED_MODEL_NOT_ALLOWED_FOR_TEAM_MESSAGE =
+  'the requested model is not allowed for your team';
+
 type AgentConfigWithRuntimeState = {
   runtime_state?: Record<string, unknown> | null;
 };
@@ -102,6 +107,13 @@ export function classifyCodeReviewActionRequiredFailure(
     return 'github_ip_allow_list';
   }
 
+  if (
+    normalized.includes(SELECTED_MODEL_UNAVAILABLE_MESSAGE) ||
+    normalized.includes(REQUESTED_MODEL_NOT_ALLOWED_FOR_TEAM_MESSAGE)
+  ) {
+    return 'selected_model_unavailable';
+  }
+
   return null;
 }
 
diff --git a/apps/web/src/lib/code-reviews/alerting/detectors.test.ts b/apps/web/src/lib/code-reviews/alerting/detectors.test.ts
index 8da8e7466e..9b50e5df27 100644
--- a/apps/web/src/lib/code-reviews/alerting/detectors.test.ts
+++ b/apps/web/src/lib/code-reviews/alerting/detectors.test.ts
@@ -236,12 +236,22 @@ describe('code review alert detectors', () => {
       reviewValues({ status: 'failed', terminal_reason: 'github_installation_required' }),
       reviewValues({ status: 'failed', terminal_reason: 'github_ip_allow_list' }),
       reviewValues({ status: 'failed', terminal_reason: 'byok_invalid_key' }),
+      reviewValues({ status: 'failed', terminal_reason: 'selected_model_unavailable' }),
       ...Array.from({ length: 13 }, () => reviewValues()),
     ]);
 
     await expect(evaluateErrorSpike(db)).resolves.toEqual({ tripped: false });
   });
 
+  it('excludes selected model unavailable from error-spike counts', async () => {
+    await insertReviews([
+      reviewValues({ status: 'failed', terminal_reason: 'selected_model_unavailable' }),
+      ...Array.from({ length: 3 }, () => reviewValues()),
+    ]);
+
+    await expect(evaluateErrorSpike(db)).resolves.toEqual({ tripped: false });
+  });
+
   it('excludes legacy model-not-found failed rows from error-spike counts', async () => {
     await insertReviews([
       reviewValues({
diff --git a/apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.test.ts b/apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.test.ts
index 14c3d85da2..092107d2e2 100644
--- a/apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.test.ts
+++ b/apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.test.ts
@@ -369,6 +369,58 @@ describe('tryDispatchPendingReviews', () => {
     expect(mockSendCodeReviewDisabledEmail).toHaveBeenCalledTimes(1);
   });
 
+  it('disables Code Reviewer for selected-model worker status failures', async () => {
+    const recentTimestamp = minutesAgo(1);
+    const owner = { type: 'user', id: testUser.id } satisfies ReviewOwner;
+    const errorMessage =
+      'prepareSession failed (400): {"error":{"message":"Selected model is not available for this cloud agent session"}}';
+    const agentConfig = await insertAgentConfigForUser();
+    mockGetAgentConfigForOwner.mockResolvedValue(agentConfig);
+    mockDispatchReview.mockRejectedValue(
+      new Error("Dispatch returned terminal status 'failed' for review selected-model-review")
+    );
+    mockGetReviewStatus.mockResolvedValue({
+      reviewId: 'unused',
+      status: 'failed',
+      errorMessage,
+      terminalReason: 'selected_model_unavailable',
+    });
+
+    const [review] = await db
+      .insert(cloud_agent_code_reviews)
+      .values(
+        reviewValues({
+          owner,
+          status: 'pending',
+          createdAt: recentTimestamp,
+          updatedAt: recentTimestamp,
+        })
+      )
+      .returning({ id: cloud_agent_code_reviews.id });
+
+    const result = await tryDispatchPendingReviews({
+      type: 'user',
+      id: testUser.id,
+      userId: testUser.id,
+    });
+
+    const storedReview = await getStoredReview(review.id);
+    const storedConfig = await db.query.agent_configs.findFirst({
+      where: eq(agent_configs.id, agentConfig.id),
+    });
+
+    expect(result).toEqual({ dispatched: 1, notDispatched: 0, activeCount: 1 });
+    expect(storedReview).toEqual(
+      expect.objectContaining({
+        status: 'failed',
+        terminalReason: 'selected_model_unavailable',
+        errorMessage,
+      })
+    );
+    expect(storedConfig?.is_enabled).toBe(false);
+    expect(mockSendCodeReviewDisabledEmail).toHaveBeenCalledTimes(1);
+  });
+
   it('refuses to prepare pending work while action-required state is present', async () => {
     const recentTimestamp = minutesAgo(1);
     const owner = { type: 'user', id: testUser.id } satisfies ReviewOwner;
diff --git a/apps/web/src/routers/admin-code-reviews-router.test.ts b/apps/web/src/routers/admin-code-reviews-router.test.ts
index f4120b00ee..1720b78279 100644
--- a/apps/web/src/routers/admin-code-reviews-router.test.ts
+++ b/apps/web/src/routers/admin-code-reviews-router.test.ts
@@ -398,6 +398,52 @@ describe('adminCodeReviewsRouter', () => {
     expect(segmentation.ownershipBreakdown[0]).toMatchObject({ failed: 1 });
   });
 
+  it('buckets selected-model-unavailable terminal reasons as action required', async () => {
+    const owner = { type: 'user', id: adminUser.id } satisfies ReviewOwner;
+    const [review] = await db
+      .insert(cloud_agent_code_reviews)
+      .values(
+        reviewValues({
+          owner,
+          status: 'failed',
+          createdAt: timestamp(760),
+          terminalReason: 'selected_model_unavailable',
+          errorMessage: 'Selected model is not available for this cloud agent session',
+        })
+      )
+      .returning({ id: cloud_agent_code_reviews.id });
+
+    await db.insert(cloud_agent_code_review_attempts).values({
+      code_review_id: review.id,
+      attempt_number: 1,
+      status: 'failed',
+      terminal_reason: 'selected_model_unavailable',
+      error_message: 'Selected model is not available for this cloud agent session',
+      created_at: timestamp(761),
+      started_at: timestamp(762),
+      completed_at: timestamp(763),
+    });
+
+    const caller = await createCallerForUser(adminUser.id);
+    const finalErrors = await caller.admin.codeReviews.getErrorAnalysis(filterInput());
+    const attemptErrors = await caller.admin.codeReviews.getErrorAnalysis(
+      filterInput({ retryAccountingMode: 'all_attempts' })
+    );
+
+    expect(finalErrors.categories).toEqual([
+      expect.objectContaining({ category: 'Action Required', count: 1 }),
+    ]);
+    expect(finalErrors.details).toEqual([
+      expect.objectContaining({ category: 'Action Required', count: 1 }),
+    ]);
+    expect(attemptErrors.categories).toEqual([
+      expect.objectContaining({ category: 'Action Required', count: 1 }),
+    ]);
+    expect(attemptErrors.details).toEqual([
+      expect.objectContaining({ category: 'Action Required', count: 1 }),
+    ]);
+  });
+
   it('classifies all-attempt model-not-found outcomes as cancellations instead of failures', async () => {
     const [review] = await db
       .insert(cloud_agent_code_reviews)
diff --git a/apps/web/src/routers/admin-code-reviews-router.ts b/apps/web/src/routers/admin-code-reviews-router.ts
index 5307fe2822..4a47afad62 100644
--- a/apps/web/src/routers/admin-code-reviews-router.ts
+++ b/apps/web/src/routers/admin-code-reviews-router.ts
@@ -73,7 +73,7 @@ const excludeModelNotFoundAttempt = sql`COALESCE(${cloud_agent_code_review_attem
  * Pattern matching is ordered from most-specific to least-specific.
  */
 const errorCategoryExpr = sql<string>`CASE
-  WHEN ${cloud_agent_code_reviews.terminal_reason} IN ('github_installation_required', 'github_ip_allow_list', 'byok_invalid_key') THEN 'Action Required'
+  WHEN ${cloud_agent_code_reviews.terminal_reason} IN ('github_installation_required', 'github_ip_allow_list', 'byok_invalid_key', 'selected_model_unavailable') THEN 'Action Required'
   WHEN ${cloud_agent_code_reviews.error_message} LIKE '%rate limit%' OR ${cloud_agent_code_reviews.error_message} LIKE '%Rate limit%' OR ${cloud_agent_code_reviews.error_message} LIKE '%429%' THEN 'Rate Limited'
   WHEN ${cloud_agent_code_reviews.error_message} LIKE '%timeout%' OR ${cloud_agent_code_reviews.error_message} LIKE '%Timeout%' OR ${cloud_agent_code_reviews.error_message} LIKE '%ETIMEDOUT%' OR ${cloud_agent_code_reviews.error_message} LIKE '%timed out%' THEN 'Timeout'
   WHEN ${cloud_agent_code_reviews.error_message} LIKE '%context window%' OR ${cloud_agent_code_reviews.error_message} LIKE '%token limit%' OR ${cloud_agent_code_reviews.error_message} LIKE '%too large%' OR ${cloud_agent_code_reviews.error_message} LIKE '%maximum context length%' THEN 'Context Window Exceeded'
@@ -87,7 +87,7 @@ const errorCategoryExpr = sql<string>`CASE
 END`;
 
 const attemptErrorCategoryExpr = sql<string>`CASE
-  WHEN ${cloud_agent_code_review_attempts.terminal_reason} IN ('github_installation_required', 'github_ip_allow_list', 'byok_invalid_key') THEN 'Action Required'
+  WHEN ${cloud_agent_code_review_attempts.terminal_reason} IN ('github_installation_required', 'github_ip_allow_list', 'byok_invalid_key', 'selected_model_unavailable') THEN 'Action Required'
   WHEN ${cloud_agent_code_review_attempts.error_message} LIKE '%rate limit%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%Rate limit%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%429%' THEN 'Rate Limited'
   WHEN ${cloud_agent_code_review_attempts.error_message} LIKE '%timeout%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%Timeout%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%ETIMEDOUT%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%timed out%' THEN 'Timeout'
   WHEN ${cloud_agent_code_review_attempts.error_message} LIKE '%context window%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%token limit%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%too large%' OR ${cloud_agent_code_review_attempts.error_message} LIKE '%maximum context length%' THEN 'Context Window Exceeded'
diff --git a/packages/db/src/schema-types.ts b/packages/db/src/schema-types.ts
index 39bc90c332..a108087ad1 100644
--- a/packages/db/src/schema-types.ts
+++ b/packages/db/src/schema-types.ts
@@ -1286,6 +1286,7 @@ export const CODE_REVIEW_TERMINAL_REASONS = [
   'github_installation_required',
   'github_ip_allow_list',
   'byok_invalid_key',
+  'selected_model_unavailable',
   'user_cancelled',
   'superseded',
   'interrupted',
@@ -1312,6 +1313,7 @@ export const CODE_REVIEW_BENIGN_TERMINAL_REASONS = [
   'github_installation_required',
   'github_ip_allow_list',
   'byok_invalid_key',
+  'selected_model_unavailable',
   'user_cancelled',
   'superseded',
 ] as const satisfies readonly CodeReviewTerminalReason[];
diff --git a/packages/worker-utils/src/cloud-agent-next-client.ts b/packages/worker-utils/src/cloud-agent-next-client.ts
index 12da76ec54..b136e1c70e 100644
--- a/packages/worker-utils/src/cloud-agent-next-client.ts
+++ b/packages/worker-utils/src/cloud-agent-next-client.ts
@@ -122,6 +122,7 @@ export type CloudAgentTerminalReason =
   | 'github_installation_required'
   | 'github_ip_allow_list'
   | 'byok_invalid_key'
+  | 'selected_model_unavailable'
   | 'user_cancelled'
   | 'superseded'
   | 'interrupted'
diff --git a/services/code-review-infra/src/code-review-orchestrator.ts b/services/code-review-infra/src/code-review-orchestrator.ts
index 30a547a131..ffc0a3e1ef 100644
--- a/services/code-review-infra/src/code-review-orchestrator.ts
+++ b/services/code-review-infra/src/code-review-orchestrator.ts
@@ -98,6 +98,11 @@ const RISKY_COMMAND_PATTERNS = [
   'vitest',
 ];
 
+const SELECTED_MODEL_UNAVAILABLE_MESSAGE =
+  'selected model is not available for this cloud agent session';
+const REQUESTED_MODEL_NOT_ALLOWED_FOR_TEAM_MESSAGE =
+  'the requested model is not allowed for your team';
+
 function findRiskyPattern(command: string): string | null {
   const normalized = command.toLowerCase();
   const match = RISKY_COMMAND_PATTERNS.find(pattern => normalized.includes(pattern));
@@ -731,6 +736,14 @@ export class CodeReviewOrchestrator extends DurableObject<Env> {
     }
 
     const message = error.message.toLowerCase();
+
+    if (
+      message.includes(SELECTED_MODEL_UNAVAILABLE_MESSAGE) ||
+      message.includes(REQUESTED_MODEL_NOT_ALLOWED_FOR_TEAM_MESSAGE)
+    ) {
+      return 'selected_model_unavailable';
+    }
+
     if (
       message.includes('timeout') ||
       message.includes('timed out') ||
diff --git a/services/code-review-infra/src/types.ts b/services/code-review-infra/src/types.ts
index 78a07180da..d8eb254402 100644
--- a/services/code-review-infra/src/types.ts
+++ b/services/code-review-infra/src/types.ts
@@ -107,6 +107,7 @@ export const InternalStatusResponseSchema = z.object({
       'github_installation_required',
       'github_ip_allow_list',
       'byok_invalid_key',
+      'selected_model_unavailable',
       'user_cancelled',
       'superseded',
       'interrupted',
diff --git a/services/code-review-infra/test/integration/code-review-orchestrator.test.ts b/services/code-review-infra/test/integration/code-review-orchestrator.test.ts
index 3dcb0e835a..b60b03d45a 100644
--- a/services/code-review-infra/test/integration/code-review-orchestrator.test.ts
+++ b/services/code-review-infra/test/integration/code-review-orchestrator.test.ts
@@ -886,6 +886,86 @@ describe('CodeReviewOrchestrator recovery', () => {
     expect(stored?.sandboxRetryAttempted).toBeUndefined();
   });
 
+  it('maps selected-model prepareSession 400 failures to action-required terminal reason', async () => {
+    const stub = getReviewStub();
+    const fetchMock = vi.fn(async (request: RequestInfo | URL) => {
+      const url = String(request);
+      if (url.includes('/api/internal/code-review-status/')) {
+        return Response.json({ success: true });
+      }
+      if (url.includes('/trpc/prepareSession')) {
+        return trpcError(
+          400,
+          'Selected model is not available for this cloud agent session',
+          'BAD_REQUEST'
+        );
+      }
+      return new Response('unexpected fetch', { status: 500 });
+    });
+    globalThis.fetch = fetchMock;
+
+    await runInDurableObject(stub, async (_instance: CodeReviewOrchestrator, state) => {
+      await state.storage.put('state', codeReview());
+      await state.storage.setAlarm(Date.now() + 30_000);
+    });
+
+    const ran = await runDurableObjectAlarm(stub);
+
+    expect(ran).toBe(true);
+    await expect(stub.status()).resolves.toMatchObject({
+      status: 'failed',
+      terminalReason: 'selected_model_unavailable',
+    });
+    expect(fetchCalls(fetchMock, '/trpc/prepareSession')).toHaveLength(1);
+    expect(fetchCalls(fetchMock, '/trpc/initiateFromKilocodeSessionV2')).toHaveLength(0);
+    expect(lastStatusUpdateBody(fetchMock)).toMatchObject({
+      status: 'failed',
+      terminalReason: 'selected_model_unavailable',
+    });
+    await expect(storedReview(stub)).resolves.toMatchObject({
+      status: 'failed',
+      terminalReason: 'selected_model_unavailable',
+    });
+  });
+
+  it('maps model-not-allowed prepareSession 400 failures to action-required terminal reason', async () => {
+    const stub = getReviewStub();
+    const fetchMock = vi.fn(async (request: RequestInfo | URL) => {
+      const url = String(request);
+      if (url.includes('/api/internal/code-review-status/')) {
+        return Response.json({ success: true });
+      }
+      if (url.includes('/trpc/prepareSession')) {
+        return trpcError(
+          400,
+          'Not Found: The requested model is not allowed for your team.',
+          'BAD_REQUEST'
+        );
+      }
+      return new Response('unexpected fetch', { status: 500 });
+    });
+    globalThis.fetch = fetchMock;
+
+    await runInDurableObject(stub, async (_instance: CodeReviewOrchestrator, state) => {
+      await state.storage.put('state', codeReview());
+      await state.storage.setAlarm(Date.now() + 30_000);
+    });
+
+    const ran = await runDurableObjectAlarm(stub);
+
+    expect(ran).toBe(true);
+    await expect(stub.status()).resolves.toMatchObject({
+      status: 'failed',
+      terminalReason: 'selected_model_unavailable',
+    });
+    expect(fetchCalls(fetchMock, '/trpc/prepareSession')).toHaveLength(1);
+    expect(fetchCalls(fetchMock, '/trpc/initiateFromKilocodeSessionV2')).toHaveLength(0);
+    expect(lastStatusUpdateBody(fetchMock)).toMatchObject({
+      status: 'failed',
+      terminalReason: 'selected_model_unavailable',
+    });
+  });
+
   it('does not retry configured-session lookup failures nested in wrapper readiness output', async () => {
     const stub = getReviewStub();
     const fetchMock = vi.fn(async (request: RequestInfo | URL) => {