Outage in Anthropic

Sonnet 4.6 elevated rate of errors

Resolved Major

April 08, 2026 - Started about 14 hours ago - Lasted about 3 hours
Official incident page

Incident Report

Summary AI Generated

Anthropic's Sonnet 4.6 model experienced elevated error rates for 3.2 hours, causing tasks to hang and requiring multiple retries, with users encountering 529 "Overloaded" API errors. The issue affected claude.ai, the API, and console across all platforms. Anthropic identified and implemented a fix, resolving the incident after monitoring confirmed normal operations were restored.

We are currently investigating this issue.

Components affected

Anthropic claude.ai Anthropic api.anthropic.com Anthropic console.anthropic.com

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Latest Updates ( sorted recent to last )

RESOLVED about 10 hours ago - at 04/08/2026 09:33AM

The incident is now resolved. Sonnet 4.6 exhibited errors above baseline between 23:00 PT / 7:00 UTC and 1:50 PT / 9:50 UTC.

MONITORING about 11 hours ago - at 04/08/2026 09:01AM

A fix has been implemented and we are monitoring the results.

IDENTIFIED about 12 hours ago - at 04/08/2026 07:59AM

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

INVESTIGATING about 13 hours ago - at 04/08/2026 07:06AM

We are continuing to investigate this issue.

INVESTIGATING about 14 hours ago - at 04/08/2026 06:23AM

We are currently investigating this issue.

Latest Anthropic outages

Outage affecting Workspace Creation - 39 minutes ago

Elevated errors on Claude.ai, API, Claude Code - about 2 hours ago

Elevated errors on Claude.ai - 1 day ago

Sonnet 4.6 elevated rate of errors - 2 days ago

Elevated errors on Claude.ai - 2 days ago

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