Resolved
The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.
Posted Aug 18, 2026 – 19:01 UTC
Monitoring
A fix has been implemented and we are monitoring the results.
Posted Aug 18, 2026 – 18:26 UTC
Update
We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.
Posted Aug 18, 2026 – 17:12 UTC
Update
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.
Posted Aug 18, 2026 – 16:20 UTC
Investigating
We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.
Posted Aug 18, 2026 – 16:20 UTC
This incident affected: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.
