Anthropic incident: Degraded performance for Claude Opus 5

Affected components

• Claude API (api.anthropic.com)
• Claude Code
• Claude Cowork
• claude.ai

1. resolvedAug 5, 2026, 14:34 UTC

   This incident has been resolved.

2. identifiedAug 5, 2026, 13:51 UTC

   We have identified the cause of elevated errors on requests to Claude Opus 5 and are working on a fix. We will provide an update as soon as possible.

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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• OVHcloud: [EU-WEST-PAR][Storage] - Object storage incident notificationMinor · Aug 4, 2026, 14:08 UTC
• Twilio: Elevated 500 Errors on Multiple Twilio APIsMinor · Aug 4, 2026, 16:45 UTC
• Twilio: SMS Delivery Delays and Failures from Twilio to C+W Sure United KingdomMinor · Aug 5, 2026, 00:59 UTC
• Twilio: Issues Connecting to Video Rooms in the IN1 regionMinor · Aug 5, 2026, 06:22 UTC
• Claude: Degraded performance of multiple modelsMinor · Aug 5, 2026, 07:05 UTC
• Cursor: Investigating service degradationMinor · Aug 5, 2026, 08:01 UTC

How often does Anthropic have incidents?

Anthropic reported 85 incidents in the last 90 days, 32 of them major or critical. A typical incident lasted 1h 7m. See Anthropic's uptime and incident history