ChangesAnthropicElevated errors for Claude Sonnet 5.5
Anthropic: Incident updated: Elevated errors for Claude Sonnet 5.5
Summary pending. The diff below shows exactly what changed.
Incident page: the full timeline of updates
What changed
Struck in red is what Anthropic removed; blue is what they added. Muted text is unchanged context.
Compared with the previous archived version of this incident (10 to 30-minute polling). View the live incident (opens in new tab).
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 these records existed by then and have not been changed since, by anyone, Rewindex included.
How the archive is checked, and what it cannot prove.
Before captured
In the 2026-10-27 checkpoint, timestamped by DigiCert and FreeTSA on . Record hash
a07c5bd1016940cc…After captured
In the 2026-10-27 checkpoint, timestamped by DigiCert and FreeTSA on . Record hash
c508edfc6c61bc8c…
History of this incident
Tuesday, October 27
3 incident changes
- Normal progressIncident
Incident updateElevated errors for Claude Sonnet 5.5
- Normal progressIncident
Incident updateElevated errors for Claude Sonnet 5.5this change
- OutageMajor incident
Elevated errors for Claude Sonnet 5.5
Anthropic reported a major incident involving elevated errors on Claude Sonnet 5.5 requests across claude.ai, Claude API - api.anthropic.com, Claude Code, and Claude Cowork. It started at 2026-10-27 09:14 UTC and was still open when archived, with 0 min elapsed at the last update; Anthropic was investigating, with no cause or fix stated.
Cite this
Incident updated: Elevated errors for Claude Sonnet 5.5 on Anthropic’s status page, changed 2026-10-27 09:43 UTC (change 2 of 3).
- Title
- Incident updated: Elevated errors for Claude Sonnet 5.5
- Vendor
- Anthropic
- Date
- URL
- https://rewindex.com/change/r337646dd6dcdd1