Claude Status · History · Incident #5904

RESOLVED

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5

Major · Started Jul 25, 2026 · 6:40 PM

Duration

1h 4m
Severity

Major
Detection lead

—
User reports

Peak 10/hr

Summary

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5

This incident has been resolved.

Started

Jul 25, 2026 · 6:40 PM
Resolved

Jul 25, 2026 · 7:44 PM
Duration

1h 4m
Severity

Major

Event timeline

How this incident unfolded

◐

Investigating
Jul 25 · 6:40 PM Claude

We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Haiku 4.5. We will provide an update as soon as possible.
◆

Identified
Jul 25 · 6:44 PM Claude

The issue has been identified and a fix is being implemented.
✓

Resolved
Jul 25 · 7:44 PM Claude

This incident has been resolved.

User reports · incident window

Report volume over time

Hourly report count. Red bars mark the incident window.

Peak: 10 reports/hr

← Before incident After →

Pattern

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