# Claude: Elevated errors for Claude Opus 5.5

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-10-06 12:24 UTC · Resolved: 2026-10-06 12:43 UTC · Duration: 19 min
- Updates: 3 · Affected components: Claude Cowork, Claude API (api.anthropic.com), claude.ai, Claude Code
- [Vendor status page: https://stspg.io/bzc81gbv1b99](https://stspg.io/bzc81gbv1b99)
- [Company: Claude](https://rewindex.com/company/claude.md)

## Summary

Claude reported a major incident involving elevated errors for Claude Opus 5.5 across claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork. It started at 2026-10-06 12:24 UTC and was resolved at 2026-10-06 12:43 UTC, lasting 18 min. Claude said it identified the cause but did not disclose the cause or fix. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-10-06 12:24 UTC: We are investigating elevated errors on requests to Claude Opus 5.5. We will provide an update as soon as possible.
- **identified** 2026-10-06 12:37 UTC: We have identified the cause of elevated errors on requests to Claude Opus 5.5 and are working on a fix. We will provide an update as soon as possible.
- **resolved** 2026-10-06 12:43 UTC: The issue affecting Claude Opus 5.5 has been resolved.

## Rewindex changes for this incident

- 2026-10-06 12:24 UTC: [Major incident: Elevated errors for Claude Opus 5.5](https://rewindex.com/change/i1e447a5fb7e482.md)


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Canonical: https://rewindex.com/company/claude/incidents/ch27pb90bn85 · Markdown: https://rewindex.com/company/claude/incidents/ch27pb90bn85.md · JSON: https://rewindex.com/api/v1/companies/claude/incidents/ch27pb90bn85 · Generated 2026-10-18T10:33:50.168Z