Incident report · read from Anthropic's status page

Anthropic incident: Degraded performance for Claude Opus 5 and Claude Haiku 4.5

Resolved after 1 h 19 m (19 Aug 2026, 09:42–11:02 UTC), impact minor, affecting Claude Cowork, Claude API (api.anthropic.com), claude.ai and Claude Code.

Timeline

1. 19 Aug 2026 at 09:42 UTC identified

   We have identified the cause of elevated errors on requests to Claude Opus 5 and Claude Haiku 4.5 and are working on a fix. We will provide an update as soon as possible.

2. 19 Aug 2026 at 10:33 UTC monitoring

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

3. 19 Aug 2026 at 11:02 UTC resolved

   This incident has been resolved.

Affected components

• Claude Cowork: degraded for 51 m
• Claude API (api.anthropic.com): degraded for 51 m
• claude.ai: degraded for 51 m
• Claude Code: degraded for 51 m

Source

Anthropic's own report of this incident, on Anthropic's status page. This page is a record of Anthropic's own report; where the two disagree, theirs is right.

Last checked 8 Sep 2026 at 16:17 UTC.

Must Have AI is a parody and is not affiliated with, endorsed by or connected to OpenAI, Anthropic or Google. Every outage shown here is read from the provider's own public status page.