diff --git a/backend/apps/nine_router.py b/backend/apps/nine_router.py
index d4497957..fd098bba 100644
--- a/backend/apps/nine_router.py
+++ b/backend/apps/nine_router.py
@@ -123,20 +123,12 @@ async def start_oauth(provider: str) -> dict:
         except Exception:
             pass
 
-        # Fall back to authorization_code flow
-        callback_url = f"http://localhost:{NINE_ROUTER_PORT}/api/oauth/{provider}/callback"
-        r = await client.get(
-            f"{NINE_ROUTER_API}/oauth/{provider}/authorize",
-            params={"redirect_uri": callback_url},
-        )
-        r.raise_for_status()
-        data = r.json()
+        # For authorization_code providers (Claude, Codex, Gemini),
+        # open 9Router's own dashboard page where the user can connect.
+        # 9Router handles the full OAuth flow (popup + callback) internally.
         return {
-            "flow": "authorization_code",
-            "auth_url": data.get("authUrl", ""),
-            "code_verifier": data.get("codeVerifier", ""),
-            "state": data.get("state", ""),
-            "redirect_uri": callback_url,
+            "flow": "dashboard_redirect",
+            "dashboard_url": f"http://localhost:{NINE_ROUTER_PORT}/dashboard/providers",
         }
 
 
diff --git a/frontend/src/app/pages/Settings/Settings.tsx b/frontend/src/app/pages/Settings/Settings.tsx
index 703007ef..9d4727ef 100644
--- a/frontend/src/app/pages/Settings/Settings.tsx
+++ b/frontend/src/app/pages/Settings/Settings.tsx
@@ -251,9 +251,10 @@ const SubscriptionCards: React.FC = () => {
         setPollTimer(timer);
         setTimeout(() => { clearInterval(timer); setConnecting(null); setUserCode(''); }, 300000);
 
-      } else if (data.flow === 'authorization_code') {
-        // Auth code flow (Claude, Codex, Gemini) — open browser, poll for connection
-        if (data.auth_url) window.open(data.auth_url, '_blank');
+      } else if (data.flow === 'authorization_code' || data.flow === 'dashboard_redirect') {
+        // Auth code flow (Claude, Codex, Gemini) — open 9Router dashboard, poll for connection
+        const url = data.dashboard_url || data.auth_url;
+        if (url) window.open(url, '_blank');
 
         // Poll the providers list until this provider appears as connected
         const timer = setInterval(async () => {