Anthropic change history: Elevated errors on claude.ai, Claude Code, Claude Cowork and the Claude API

Anthropic reported major errors affecting claude.ai, Claude Code, Claude Cowork and the Claude API, blocking sign-ins, new sessions, purchases and uploads; some messages may not have been saved. Impact occurred from 14:00 UTC to 14:59 UTC; the incident started 2026-09-29 14:21 UTC and resolved at 2026-09-29 16:27 UTC (recorded duration: 2 h 5 min).