Sonnet 5 experienced a brief spike in errors, now fixed and monitoring.
Elevated errors on Claude Sonnet 5 — fix implemented and monitoring
Original: Elevated errors on Claude Sonnet 5
Importance: 本番API環境の障害で既存ユーザーのシステムに即影響。
Summary
Anthropic's status page reported elevated error rates on Claude Sonnet 5 on August 4th. Investigation began at 06:16 UTC, and a fix was implemented by 06:28 UTC with ongoing monitoring. The exact cause and scope of impact are not detailed in the brief status update, but API users and Claude.ai users may have experienced connection delays or error responses during the incident window.
Key Points
- Elevated error rates detected on Sonnet 5
- Fix deployed at 06:28 UTC
- Ongoing monitoring of recovery
- Root cause not yet disclosed
View developer notes (APIs, breaking changes, migration)
Elevated error rates detected on Claude Sonnet 5 API endpoints at 06:16 UTC on August 4th, likely manifesting as response timeouts and 5xx HTTP errors in production. A fix was deployed by 06:28 UTC with ongoing monitoring. Developers using the Message API, Batch API, or Anthropic SDKs (Python/TypeScript) should review retry logic and error handling that may have triggered during the incident window. Context window or request rate limits may have been temporarily affected.
Source: https://status.claude.com/incidents/8k9mjhq7wmv3
Outlet: Anthropic Status
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