Outage in Claude

Elevated errors for Claude Sonnet 5.5 and other models

Resolved Major

October 25, 2026 - Started 4 days ago - Lasted about 2 hours
Official incident page

Incident Report

Summary AI Generated

**Claude API & claude.ai – Elevated Errors (October 24–25, 2026)** Multiple Claude models (Mythos 5.1, Fable 5.1, Opus 5.5, Sonnet 5.5, and Haiku 5.5) experienced elevated request errors affecting both claude.ai and the Anthropic API for approximately 30 minutes (23:05–23:35 PT on October 24). The root cause was identified and a fix was deployed, with full resolution confirmed shortly after. Total incident duration from opening to closure was roughly 1.6 hours.

We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible.

Components affected

Claude claude.ai Claude api.anthropic.com

Latest Updates ( sorted recent to last )

RESOLVED 4 days ago - at 10/25/2026 07:53AM

The issue affecting Claude services has been resolved. Impact occurred from 23:05 PT on October 24 / 06:05 UTC on October 25 to 23:35 PT on October 24 / 06:35 UTC on October 25.

MONITORING 4 days ago - at 10/25/2026 06:35AM

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

IDENTIFIED 4 days ago - at 10/25/2026 06:27AM

We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible.

INVESTIGATING 4 days ago - at 10/25/2026 06:14AM

We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible.

Latest Claude outages

Elevated errors affecting the Google Calendar connector - about 17 hours ago

Elevated errors affecting the Gmail connector - 1 day ago

Elevated errors for Claude Sonnet 5.5 - 2 days ago

Elevated errors for Claude Fable 5.1 - 4 days ago

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