Multi-model errors suggest backend infrastructure issue. Production users should verify retry logic now.
Elevated errors affecting Claude Fable 5, Sonnet 5, Haiku 4.5, and other models
Original: Elevated errors for Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other models
Importance: 本番環境への直接影響を伴う障害で、Anthropicの主要モデル複数が同時に影響を受けている
Summary
Anthropic is investigating elevated error rates affecting requests to Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models as of July 25 at 21:34 UTC. The company has not yet disclosed the root cause but states an update will be provided soon. Multiple models are impacted simultaneously.
Key Points
- Claude Fable 5, Sonnet 5, Haiku 4.5, others affected
- Elevated error rates impacting request success rates
- Root cause under investigation, details pending
- Simultaneous impact suggests shared infrastructure issue
View developer notes (APIs, breaking changes, migration)
Multiple Claude API model versions (Fable 5, Sonnet 5, Haiku 4.5, others) are experiencing elevated error rates on requests. Root cause, error codes, and regional scope remain undisclosed as of the incident notice. The broad model coverage suggests shared backend infrastructure failure rather than model-specific issues, but this is unconfirmed. Developers and SaaS operators running these models in production should evaluate retry logic, circuit breaker activation, and fallback model strategies. Continued monitoring via status.claude.com advised.
Source: https://status.claude.com/incidents/j6gv862066n7
Outlet: Anthropic Status
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