Anthropic systems outage on June 16
On June 16, 2026, users encountered widespread errors across Anthropic services. The incident impacted the claude.ai web interface, API, Claude Code, and Claude Cowork agent.
The issue was detected at 17:29 UTC. Thirty-one minutes later, the company announced an investigation into the cause.
By 18:00 UTC, developers had rolled out a fix. Anthropic continues to monitor system stability.
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