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Anthropic Investigating Elevated Errors Affecting Multiple Claude Models

Claude Fable 5, Sonnet 5, Haiku 4.5, and other models experiencing service disruptions.

By The Downtime · Jul 25, 2026 · 9:45 PM ·Updated 3 weeks ago

Anthropic is investigating elevated error rates affecting requests to Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. The incident is classified as major impact and remains under investigation.

Anthropnic develops Claude, an AI assistant widely used by businesses and developers for tasks including content generation, coding, and research.

The company identified the issue and began investigating. No timeline for resolution has been provided.

This is a developing story and we will provide updates as more information becomes available.

🕒 Live updates (2)

resolved Jul 25, 10:08 PM

This incident has been resolved.

investigating Jul 25, 9:34 PM

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.

📎 Sources

Outage details are aggregated from official provider status pages. The Downtime reports them as a public service and is not affiliated with the providers named.

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