# Anthropic: Degraded performance for multiple models

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-08-18 16:20 UTC · Resolved: 2026-08-18 19:01 UTC · Duration: 2.7 h
- Updates: 5 · Affected components: Claude Cowork, Claude API (api.anthropic.com), claude.ai, Claude Code
- [Vendor status page: https://stspg.io/tcsfmtc03xgm](https://stspg.io/tcsfmtc03xgm)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Timeline of updates

- **investigating** 2026-08-18 16:20 UTC: We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.
- **investigating** 2026-08-18 16:20 UTC: 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** 2026-08-18 17:12 UTC: We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.
- **monitoring** 2026-08-18 18:26 UTC: A fix has been implemented and we are monitoring the results.
- **resolved** 2026-08-18 19:01 UTC: The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.


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Canonical: https://rewindex.com/company/anthropic/incidents/q7txxvbsftgq · Markdown: https://rewindex.com/company/anthropic/incidents/q7txxvbsftgq.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/q7txxvbsftgq · Generated 2026-10-18T11:46:18.694Z