Anthropic incident: Degraded performance for multiple models

Affected components

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

1. resolvedAug 12, 2026, 18:07 UTC

   This issue has been resolved.

2. identifiedAug 12, 2026, 17:28 UTC

   We are continuing to work to resolve an issue resulting in slightly elevated errors on requests to Claude Fable 5. We will provide an update as soon as possible.

3. identifiedAug 12, 2026, 16:10 UTC

   We have identified an issue which resulted in errors across multiple models. At this time, errors are primarily impacting Claude Fable 5 and we are working to fully resolve these issues.

4. investigatingAug 12, 2026, 13:50 UTC

   We are investigating elevated errors on requests to multiple models. 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.

• Sentry: Delayed Error ingestion in our US regionMajor · Aug 12, 2026, 11:45 UTC
• Akamai: Certificate Provisioning System (CPS) IssuesMinor · Aug 11, 2026, 10:11 UTC
• Sentry: Sentry API timeouts (US)Minor · Aug 12, 2026, 12:58 UTC
• GitHub: Incident with Pull Requests and IssuesMinor · Aug 12, 2026, 16:16 UTC
• CircleCI: GitHub service degradation may impact customers using GitHubMinor · Aug 12, 2026, 16:33 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