Outage in Anthropic

Elevated errors on Claude Sonnet 4.6

Resolved Minor

March 16, 2026 - Started about 16 hours ago - Lasted about 3 hours
Official incident page

Incident Report

Summary AI Generated

Anthropic experienced elevated error rates on Claude Sonnet 4.6 that specifically impacted free tier users across claude.ai, console.anthropic.com, and api.anthropic.com. The issue was identified and a fix was implemented over the course of 2.6 hours. The incident has been resolved.

There's an elevated error rate for free tier users on Claude Sonnet 4.6. We are investigating

Components affected

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

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Latest Updates ( sorted recent to last )

RESOLVED about 14 hours ago - at 03/16/2026 04:35PM

This incident has been resolved.

IDENTIFIED about 15 hours ago - at 03/16/2026 03:35PM

We are continuing to work on a fix for this issue. This is currently only impacting free Claude.ai users.

IDENTIFIED about 15 hours ago - at 03/16/2026 03:13PM

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

IDENTIFIED about 16 hours ago - at 03/16/2026 02:05PM

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

IDENTIFIED about 16 hours ago - at 03/16/2026 02:04PM

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

IDENTIFIED about 16 hours ago - at 03/16/2026 02:02PM

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

INVESTIGATING about 16 hours ago - at 03/16/2026 02:02PM

There's an elevated error rate for free tier users on Claude Sonnet 4.6. We are investigating

Latest Anthropic outages

Elevated errors on Claude.ai - about 16 hours ago

Elevated errors on Claude.ai - about 18 hours ago

Elevated errors on Claude Opus 4.6 and Sonnet 4.6 - 3 days ago

Elevated errors on Claude Sonnet 4.6 - 5 days ago

Elevated errors on Claude.ai (including login issues for Claude Code) - 6 days ago

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