Outage in Anthropic

Elevated errors on Claude Sonnet 4.6

Resolved Minor

March 17, 2026 - Started about 1 month ago - Lasted about 5 hours
Official incident page

Incident Report

Summary AI Generated

Anthropic experienced elevated errors on Claude Sonnet 4.6 that affected claude.ai for 5 hours, with the impact initially limited to free Claude.ai users. The issue was identified and a fix was implemented, with the incident fully resolved after monitoring confirmed the solution was effective.

We are currently investigating this issue.

Components affected

Anthropic claude.ai

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Latest Updates ( sorted recent to last )

RESOLVED about 1 month ago - at 03/17/2026 01:03PM

This incident has been resolved.

MONITORING about 1 month ago - at 03/17/2026 12:13PM

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

IDENTIFIED about 1 month ago - at 03/17/2026 11:59AM

We are continuing to work on a fix for this issue.

IDENTIFIED about 1 month ago - at 03/17/2026 10:05AM

We are continuing to work on a fix for this issue.

IDENTIFIED about 1 month ago - at 03/17/2026 08:23AM

The issue has been identified and a fix is being implemented. At this stage, only free Claude.ai users are being impacted.

INVESTIGATING about 1 month ago - at 03/17/2026 08:04AM

We are currently investigating this issue.

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