# Anthropic: Elevated errors for Claude Sonnet 5

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-09-02 21:17 UTC · Resolved: 2026-09-02 21:44 UTC · Duration: 26 min
- Updates: 2 · Affected components: Claude Cowork, Claude API (api.anthropic.com), claude.ai, Claude Code
- [Vendor status page: https://stspg.io/9dgzwz3ymz42](https://stspg.io/9dgzwz3ymz42)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Summary

Claude Sonnet 5 requests experienced elevated errors affecting claude.ai, Claude API (api.anthropic.com), Claude Code and Claude Cowork. Anthropic rated the incident major; it started at 2026-09-02 21:17 UTC and was resolved after 26 min. The resolution update separately reported customer impact from 21:05 UTC to 21:19 UTC. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-09-02 21:17 UTC: We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible.
- **resolved** 2026-09-02 21:44 UTC: The issue affecting Claude Sonnet 5 has been resolved. Impact occurred from 2:05pm PT / 21:05 UTC to 2:19pm PT / 21:19 UTC.

## Rewindex changes for this incident

- 2026-09-02 21:17 UTC: [Major incident: Elevated errors for Claude Sonnet 5](https://rewindex.com/change/i4f2cf5451fb3bf.md)


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Canonical: https://rewindex.com/company/anthropic/incidents/ls6bn1x81m0w · Markdown: https://rewindex.com/company/anthropic/incidents/ls6bn1x81m0w.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/ls6bn1x81m0w · Generated 2026-10-18T12:41:51.401Z