Claude Status · History · Incident #154145

RESOLVED

Elevated errors for Claude Sonnet 5.5

Major · Started Oct 27, 2026 · 9:14 AM

Duration

42m
Severity

Major
Detection lead

—
User reports

Peak 2/hr

Summary

Elevated errors for Claude Sonnet 5.5

The issue affecting Claude services has been resolved.

Started

Oct 27, 2026 · 9:14 AM
Resolved

Oct 27, 2026 · 9:56 AM
Duration

42m
Severity

Major

Event timeline

How this incident unfolded

◐

Investigating
Oct 27 · 9:14 AM Claude

We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
◉

Monitoring
Oct 27 · 9:38 AM Claude

A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
✓

Resolved
Oct 27 · 9:56 AM Claude

The issue affecting Claude services has been resolved.

User reports · incident window

Report volume over time

Hourly report count. Red bars mark the incident window.

Peak: 2 reports/hr

← Before incident After →

Pattern

Other recent incidents

Browse full incident history →

Get an email when Claude opens, updates or resolves an incident.

Add it as a dependency monitor. The Free plan includes one.

Start Monitoring Free