Anthropic incident: Elevated latency on the Claude API for some users

Affected components

• Claude API (api.anthropic.com)
• Claude Cowork

1. resolvedSep 10, 2026, 23:24 UTC

   The issue affecting Claude services has been mitigated.

2. identifiedSep 10, 2026, 21:43 UTC

   We are experiencing slower than normal response times on the Claude API for some customers whose traffic enters through the US Midwest. Users may experience elevated latency and some request timeouts.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Anthropic's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

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• Elasticsearch: Kibana access restored for UI-assigned Organization Owners on Hosted deploymentsMajor · Sep 10, 2026, 01:30 UTC
• Supabase: Unresponsive ProjectsMajor · Sep 10, 2026, 15:26 UTC
• Claude: Degraded functionality for Claude Cowork on WindowsMajor · Sep 10, 2026, 15:54 UTC
• Telnyx: Issues affecting call audio qualityMajor · Sep 10, 2026, 16:00 UTC
• OVHcloud: [SBG5/7][Compute - Instance] - Some Instances Incident NotificationMajor · Sep 10, 2026, 22:22 UTC
• Snowflake: INC20000150Minor · Aug 28, 2026, 00:07 UTC
• Telnyx: Intermittent delays for some outbound messagesMinor · Sep 2, 2026, 21:33 UTC

How often does Anthropic have incidents?

Anthropic reported 47 incidents in the last 90 days, 21 of them major or critical. A typical incident lasted 1h 4m. See Anthropic's uptime and incident history