Error spike on multiple Claude models; cause & ETA TBD. Investigation underway.
Elevated errors on requests to multiple Claude models under investigation
Original: Elevated errors on requests to multiple models
Importance: 本番環境利用者に即座の影響を伴う障害報告のため
Summary
Anthropic reported elevated error rates on requests to some Claude models on August 20, 2026, and opened an investigation via its status page. No root cause, affected model list, or ETA for resolution has been disclosed. Production users should prepare fallback options and verify failover configurations.
Key Points
- Elevated error rates detected on requests to multiple Claude models
- Root cause, scope, and recovery ETA not yet disclosed
- Investigation ongoing; updates to follow
- Production users must prepare failover and backup strategies
- Full details available on status page
View developer notes (APIs, breaking changes, migration)
Status page disclosure only; no API endpoint specifics, model versions, error rate numbers, HTTP status codes, or retry policy recommendations disclosed. Unclear which endpoints (messages, embeddings, batch) or models (claude-3-5-sonnet, claude-opus, etc.) are affected. Awaiting developer documentation or email notification. Recommend monitoring dashboard review and enabling exponential backoff in SDK configuration.
Source: https://status.claude.com/incidents/c0ncxxm2wd9r
Outlet: Anthropic Status
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