Claude: Elevated errors on Claude Opus 5 and Haiku 4.5
Affected components: Claude CoworkClaude API (api.anthropic.com)claude.aiClaude Code
Timeline of updates
- investigating
We are currently investigating this issue.
- investigating
We are continuing to investigate this issue.
- investigating
We are currently investigating this issue.
- investigating
Haiku 4.5 is also returning errors.
- resolved
As of 7:34 PST / 14:34 UTC the errors have returned to baseline.
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves this record existed by then and has not been changed since, by anyone, Rewindex included.
How the archive is checked, and what it cannot prove.
First version captured
In the 2026-10-17 checkpoint, timestamped by FreeTSA and DigiCert on . Record hash
5e7a8732f848aead…
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab).
Cite this
Status incident (vendor impact label: minor) posted by Claude, started 2026-07-27 13:39 UTC, resolved after 57 min, 5 update(s).
- Title
- Elevated errors on Claude Opus 5 and Haiku 4.5
- Vendor
- Claude
- Date
- URL
- https://rewindex.com/company/claude/incidents/rkk5x44tndw9
Claude profileRecent Claude incidentsAll outages on July 27, 2026Claude in July 2026MarkdownJSON