Outage in Anthropic

Degraded performance for Claude Opus 5, Claude Sonnet 5

Resolved Minor

August 17, 2026 - Started 4 days ago - Lasted about 2 hours
Official incident page

Incident Report

Summary AI Generated

**Incident Summary** Anthropic experienced degraded performance affecting Claude Opus 5 and Claude Sonnet 5, with elevated error rates impacting both api.anthropic.com and claude.ai for approximately 1.6 hours. During investigation, Claude Opus 5 was restored to operational status while Claude Sonnet 5 remained degraded before a fix was implemented. The incident was fully resolved following a monitoring period after the fix was applied.

We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.

Components affected

Anthropic api.anthropic.com Anthropic claude.ai

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Latest Updates ( sorted recent to last )

RESOLVED 4 days ago - at 08/17/2026 03:29PM

This incident has been resolved.

MONITORING 4 days ago - at 08/17/2026 02:39PM

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

INVESTIGATING 4 days ago - at 08/17/2026 02:25PM

Claude Opus 5 is operational. Claude Sonnet 5 is degraded. We are investigating.

INVESTIGATING 4 days ago - at 08/17/2026 01:56PM

We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.

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Degraded performance for multiple models - 3 days ago

Service disruption on Claude services - 5 days ago

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