3 models down simultaneously — production users need careful retry logic now
Elevated errors affecting Claude Mythos 5, Fable 5, and Sonnet 5
Original: Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5
Importance: 本番環境でのAPIエラー多発は利用中のアプリケーション・サービスに直結した即時影響
Summary
Anthropic reported elevated error rates on requests to Claude Mythos 5, Fable 5, and Sonnet 5 as of Aug 13, 14:33 UTC. The cause is under investigation with updates expected soon. Multiple models experiencing concurrent failures may immediately impact API users and enterprises integrating Claude into production workflows.
Key Points
- Concurrent errors on Mythos 5, Fable 5, Sonnet 5
- Root cause under investigation, timeline unclear
- Immediate impact on active API users
- Updates posted to status.claude.com
View developer notes (APIs, breaking changes, migration)
Claude API models Mythos 5, Fable 5, and Sonnet 5 are experiencing elevated error rates on all requests. Root cause, error codes, and scope remain undisclosed on the status page. Developers should defer new requests to affected models, strengthen retry logic with exponential backoff, and monitor status.claude.com for recovery confirmation before gradual re-engagement.
Source: https://status.claude.com/incidents/j160kkjmm2n1
Outlet: Anthropic Status
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