just one network call to api.anthropic.com/api/oauth/usage using the local OAuth token, and nothing else for Anthropic.

backend/app/services/provider_usage.py

@@ -1023,10 +1023,23 @@ async def _do_fetch_provider_usage(
                 error="No API key configured.",
             )
 
+        elif local_oauth:
+            # Local Claude session is the primary source — use the subscription
+            # endpoint only.  Skipping /v1/models eliminates the sequential
+            # same-IP request that caused the subscription endpoint to 429.
+            subscription_attempted = True
+            result = ProviderUsageLive(
+                provider=provider, account_key=account_key,
+                checked_at=utcnow(), reachable=True,
+            )
+            sub_windows = await _fetch_anthropic_subscription(local_oauth)
+            if sub_windows:
+                result.subscription_windows = sub_windows
+            else:
+                result.error = "No subscription data returned."
+
         elif api_key and effective_session_key:
-            # Fire both calls concurrently — halves latency and eliminates the
+            # No local OAuth — fire API key + session key calls concurrently.
-            # sequential back-to-back requests to api.anthropic.com that caused
-            # the subscription endpoint to 429 on every initial load.
             subscription_attempted = True
             result, sub_windows = await asyncio.gather(
                 _fetch_anthropic(api_key, base_url),
@@ -1043,7 +1056,7 @@ async def _do_fetch_provider_usage(
             result = await _fetch_anthropic(api_key, base_url)
 
         else:
-            # OAuth token only — no API key configured
+            # session_key only, no local OAuth, no API key
             subscription_attempted = True
             result = ProviderUsageLive(
                 provider=provider, account_key=account_key,