Outage in Claude

Elevated errors on Claude Sonnet 4.6

Resolved Minor

March 16, 2026 - Started about 9 hours ago - Lasted about 3 hours
Official incident page

Incident Report

Summary AI Generated

Claude Sonnet 4.6 experienced elevated error rates affecting free tier users for 2.5 hours, causing chat sessions to hang, timeout after multiple attempts, and fail to provide responses. The issue impacted claude.ai, console.anthropic.com, and api.anthropic.com, with users reporting that Claude would get stuck "thinking" indefinitely or display maintenance messages. The problem was identified and resolved with a implemented fix.

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

Components affected

Claude claude.ai Claude console.anthropic.com Claude api.anthropic.com

Latest Updates ( sorted recent to last )

RESOLVED about 6 hours ago - at 03/16/2026 04:35PM

This incident has been resolved.

IDENTIFIED about 7 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 8 hours ago - at 03/16/2026 03:13PM

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

IDENTIFIED about 9 hours ago - at 03/16/2026 02:05PM

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

IDENTIFIED about 9 hours ago - at 03/16/2026 02:04PM

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

IDENTIFIED about 9 hours ago - at 03/16/2026 02:02PM

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

INVESTIGATING about 9 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 Claude outages

Elevated errors on Claude.ai - about 9 hours ago

Elevated errors on Claude.ai - about 11 hours ago

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

Elevated errors on Claude Sonnet 4.6 - 4 days ago

Elevated errors on Claude.ai (including login issues for Claude Code) - 5 days ago

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