diff --git a/src/renderer/components/team/dialogs/TeamModelSelector.tsx b/src/renderer/components/team/dialogs/TeamModelSelector.tsx
index f8ae46ac..668d90d3 100644
--- a/src/renderer/components/team/dialogs/TeamModelSelector.tsx
+++ b/src/renderer/components/team/dialogs/TeamModelSelector.tsx
@@ -134,9 +134,14 @@ export function formatTeamModelSummary(
       (providerId === 'codex' && normalizedModel.startsWith('gpt')) ||
       (providerId === 'gemini' && normalizedModel.startsWith('gemini')));
 
+  const providerActsAsBackendOnly =
+    providerId !== 'anthropic' && modelLabel !== 'Default' && !modelAlreadyCarriesProviderBrand;
+
   const parts = modelAlreadyCarriesProviderBrand
     ? [modelLabel, effortLabel]
-    : [providerLabel, modelLabel, effortLabel];
+    : providerActsAsBackendOnly
+      ? [modelLabel, `via ${providerLabel}`, effortLabel]
+      : [providerLabel, modelLabel, effortLabel];
 
   return parts.filter(Boolean).join(' · ');
 }
diff --git a/src/renderer/utils/bootstrapPromptSanitizer.ts b/src/renderer/utils/bootstrapPromptSanitizer.ts
index 6fa03a42..458996aa 100644
--- a/src/renderer/utils/bootstrapPromptSanitizer.ts
+++ b/src/renderer/utils/bootstrapPromptSanitizer.ts
@@ -118,9 +118,14 @@ function buildRuntimeSummary(
           (normalizedModel.startsWith('codex') || normalizedModel.startsWith('gpt'))) ||
         (providerId === 'gemini' && normalizedModel.startsWith('gemini')));
 
+    const providerActsAsBackendOnly =
+      providerId !== 'anthropic' && modelLabel !== 'Default' && !modelAlreadyCarriesProviderBrand;
+
     const parts = modelAlreadyCarriesProviderBrand
       ? [modelLabel, effortLabel]
-      : [providerLabel, modelLabel, effortLabel];
+      : providerActsAsBackendOnly
+        ? [modelLabel, `via ${providerLabel}`, effortLabel]
+        : [providerLabel, modelLabel, effortLabel];
     return parts.filter(Boolean).join(' · ');
   }
 
diff --git a/test/renderer/components/team/TeamModelSelector.test.ts b/test/renderer/components/team/TeamModelSelector.test.ts
new file mode 100644
index 00000000..b6a5078a
--- /dev/null
+++ b/test/renderer/components/team/TeamModelSelector.test.ts
@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest';
+
+import { formatTeamModelSummary } from '@renderer/components/team/dialogs/TeamModelSelector';
+
+describe('formatTeamModelSummary', () => {
+  it('shows cross-provider Anthropic models as backend-routed instead of brand-mismatched', () => {
+    expect(formatTeamModelSummary('codex', 'claude-opus-4-6', 'medium')).toBe(
+      'Opus 4.6 · via Codex · Medium'
+    );
+  });
+
+  it('keeps native Codex-family models branded normally', () => {
+    expect(formatTeamModelSummary('codex', 'gpt-5.4', 'medium')).toBe('GPT-5.4 · Medium');
+  });
+});