# Anthropic: Elevated errors across many models

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-07-30 05:57 UTC · Resolved: 2026-07-30 10:48 UTC · Duration: 4.8 h
- Updates: 8 · Affected components: Claude Cowork, Claude API (api.anthropic.com), claude.ai, Claude Code
- [Vendor status page: https://stspg.io/cpzpstxn0z6k](https://stspg.io/cpzpstxn0z6k)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Summary

Anthropic reported a major incident with elevated errors across many models affecting claude.ai, Claude API (api.anthropic.com), Claude Code and Claude Cowork. It started at 2026-07-30 05:57 UTC and was resolved at 2026-07-30 10:48 UTC, lasting 4 h 51 min; models partially recovered before errors returned across all models. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-07-30 05:57 UTC: We are currently investigating this issue.
- **identified** 2026-07-30 06:26 UTC: All models except Opus 5 have recovered. We're working to recover Opus 5 as well.
- **identified** 2026-07-30 07:33 UTC: As of 7:32 UTC / 0:32 PT, Opus 5 errors are back to baseline but we're seeing again Sonnet 5's errors up.
- **identified** 2026-07-30 08:06 UTC: As of 8:05 UTC / 1:05 PT, Sonnet 5 errors are back to baseline, but we're seeing an increased error rate on Fable 5.
- **identified** 2026-07-30 08:33 UTC: As of 01:33 PT / 08:33 UTC we are back to errors across all models.
- **monitoring** 2026-07-30 10:03 UTC: As of 2:58 PT / 9:58 UTC the errors are back to baseline.
- **monitoring** 2026-07-30 10:23 UTC: We are also investigating issues with Opus 4.7 and Opus 4.5.
- **resolved** 2026-07-30 10:48 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2026-07-30 05:57 UTC: [Major incident: Elevated errors across many models](https://rewindex.com/change/ib1fee952eafda0.md)


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Canonical: https://rewindex.com/company/anthropic/incidents/fsh2zzzl2c4l · Markdown: https://rewindex.com/company/anthropic/incidents/fsh2zzzl2c4l.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/fsh2zzzl2c4l · Generated 2026-10-18T10:42:23.297Z