Changes / Anthropic / Elevated errors on Claude Code and Claude Cowork
Anthropic: Major incident: Elevated errors on Claude Code and Claude Cowork
Summary
Anthropic reported a major outage affecting Claude Cowork and Claude Code on the web: some sessions failed to start or disconnected mid-task due to an upstream cloud provider issue. It started at 2026-08-28 17:22 UTC and was resolved at 2026-08-28 20:21 UTC, lasting 2 h 59 min. A mitigation was applied; affected sessions could be retried.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
Before: not present
After: Elevated errors on Claude Code and Claude Cowork
Before: not present
After: major
Before: not present
After: resolved
Before: not present
After: 2026-08-28 17:22 UTC
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After: 2026-08-28 20:21 UTC
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After: Claude Code, Claude Cowork
Before: not present
After: We have identified an issue with an upstream cloud provider affecting Claude Cowork and Claude Code on the web. Some sessions may fail to start or disconnect mid-task; affected sessions can be retried. We are in contact with the provider and will provide an update as soon as possible.
Before: not present
After: A mitigation has been applied for the issue affecting Claude Cowork and Claude Code on the web, and we are monitoring for recovery. Sessions that disconnected earlier can be retried
Before: not present
After: The issue affecting Claude Cowork and Claude Code on the web has been resolved.
First version of this incident archived by Rewindex. View the live incident.
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: Elevated errors on Claude Code and Claude Cowork (this change) Anthropic reported a major outage affecting Claude Cowork and Claude Code on the web: some sessions failed to start or disconnected mid-task due to an upstream cloud provider issue. It started at 2026-08-28 17:22 UTC and was resolved at 2026-08-28 20:21 UTC, lasting 2 h 59 min. A mitigation was applied; affected sessions could be retried. | Major incident |
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