Anthropic’s September 29, 2026 status record lists elevated errors across Claude services from 14:00 to 14:59 UTC and marks the incident resolved in a 16:27 UTC update. The affected services included Claude.ai, Claude Code, Claude Cowork, and some Claude API requests; Claude Console also had degraded performance.
Which Claude services had problems
Users could encounter failed requests, trouble loading or sending conversations, and prompts to sign in again. The later phase also affected sign-in—including single sign-on and Sign in with Apple—and other account actions. Starting new chats, voice conversations, purchases, file uploads, and some Claude Code and Claude Cowork sessions also ran into problems.
From elevated errors to resolution
Anthropic’s incident record places the impact window at 14:00–14:59 UTC. At 14:36 UTC, Anthropic reports that it has mitigated the initial errors, while a separate issue continues to affect sign-in and other functions. At 14:59 UTC, its update says most services have recovered. The final update, at 16:27 UTC, marks the incident resolved.
Anthropic’s warning about messages
Anthropic warns that some messages sent between 14:00 and 14:59 UTC might not have been saved. The warning applies to messages sent during that recorded impact window.
