# Anthropic: Elevated errors for Claude Sonnet 5.5

> Anthropic status incident “Elevated errors for Claude Sonnet 5.5” on 2026-10-27: impact major (vendor’s label), 41 min, 2 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/anthropic/incidents/lqhknfdjrcst
Last updated: 2026-10-27T15:53:56Z

- Impact (vendor’s label): major
- Status: resolved · edited after publishing
- Started: 2026-10-27 15:09 UTC · Resolved: 2026-10-27 15:50 UTC · Duration: 41 min
- Updates: 2 · Affected components: claude.ai, Claude API - api.anthropic.com, Claude Code, Claude Cowork
- [Vendor status page: https://status.claude.com/incidents/lqhknfdjrcst](https://status.claude.com/incidents/lqhknfdjrcst)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Timeline of updates

- **identified** 2026-10-27 15:09 UTC: We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
- **resolved** 2026-10-27 15:50 UTC: The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 07:42 PT / 14:42 UTC to 08:17 PT / 15:17 UTC.

## Rewindex changes for this incident

- 2026-10-27 15:09 UTC: [Major incident: Elevated errors for Claude Sonnet 5.5](https://rewindex.com/change/ic10ee9f1cee523.md)
- 2026-10-27 15:53 UTC: [Incident updated: Elevated errors for Claude Sonnet 5.5](https://rewindex.com/change/r0e8bddf0a5a0fb.md)

## Cite this

Status incident (vendor impact label: major) posted by Anthropic, started 2026-10-27 15:09 UTC, resolved after 41 min, 2 update(s); edited after publishing.

- Canonical URL: https://rewindex.com/company/anthropic/incidents/lqhknfdjrcst
- Citation: Anthropic, “Elevated errors for Claude Sonnet 5.5” (2026-10-27 15:09 UTC). Archived by Rewindex: https://rewindex.com/company/anthropic/incidents/lqhknfdjrcst (CC BY 4.0).
- Markdown link: `[Anthropic: Elevated errors for Claude Sonnet 5.5 (2026-10-27)](https://rewindex.com/company/anthropic/incidents/lqhknfdjrcst)`


---
Canonical: https://rewindex.com/company/anthropic/incidents/lqhknfdjrcst · Markdown: https://rewindex.com/company/anthropic/incidents/lqhknfdjrcst.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/lqhknfdjrcst · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T21:14:45.679Z