# Anthropic: Elevated errors on Claude Opus 5 and Haiku 4.5

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-07-27 13:39 UTC · Resolved: 2026-07-27 14:36 UTC · Duration: 57 min
- Updates: 5 · Affected components: Claude Cowork, Claude API (api.anthropic.com), claude.ai, Claude Code
- [Vendor status page: https://stspg.io/996bl17pqbbx](https://stspg.io/996bl17pqbbx)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Discussed on Hacker News

- [Elevated errors on Claude Opus 5](https://news.ycombinator.com/item?id=49068029): 105 points, 74 comments, posted 2026-07-27 11:32 UTC, posted 2 h 7 min before the vendor’s first update

## Timeline of updates

- **investigating** 2026-07-27 13:39 UTC: We are currently investigating this issue.
- **investigating** 2026-07-27 13:41 UTC: We are continuing to investigate this issue.
- **investigating** 2026-07-27 13:42 UTC: We are currently investigating this issue.
- **investigating** 2026-07-27 14:04 UTC: Haiku 4.5 is also returning errors.
- **resolved** 2026-07-27 14:36 UTC: As of 7:34 PST / 14:34 UTC the errors have returned to baseline.


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Canonical: https://rewindex.com/company/anthropic/incidents/rkk5x44tndw9 · Markdown: https://rewindex.com/company/anthropic/incidents/rkk5x44tndw9.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/rkk5x44tndw9 · Generated 2026-10-18T11:46:11.449Z