Incident report · read from Anthropic's status page

Anthropic incident: Elevated errors for Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other models

Resolved after 33 m (25 Jul 2026, 21:34–22:08 UTC), impact major, affecting Claude Cowork, Claude API (api.anthropic.com), claude.ai and Claude Code.

Timeline

1. 25 Jul 2026 at 21:34 UTC investigating

   We are investigating elevated errors on requests to Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.

2. 25 Jul 2026 at 22:08 UTC resolved

   This incident has been resolved.

Affected components

• Claude Cowork: partial outage for 33 m
• Claude API (api.anthropic.com): partial outage for 33 m
• claude.ai: partial outage for 33 m
• Claude Code: partial outage for 33 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 16:19 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.