Anthropic incident
Degraded performance for multiple models
Started
August 18, 2026 at 04:20 PM UTC
Duration
2h 41m
Resolved
August 18, 2026 at 07:01 PM UTC
Updates timeline
- Investigating
We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.
- Investigating
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.
- Investigating
We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.
- Monitoring
A fix has been implemented and we are monitoring the results.
- Resolved
The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.
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