Anthropic change history

4 incident changes

Normal progress
08:03Incident
Incident updateElevated errors for Claude Sonnet 5.5 and other modelsHN
Normal progress
06:43Incident
Incident updateElevated errors for Claude Sonnet 5.5 and other modelsHN
Normal progress
06:34Incident
Incident updateElevated errors for Claude Sonnet 5.5HN
Outage
06:14Major incident
Elevated errors for multiple modelsHN
Anthropic reported a major incident involving elevated request errors for Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5, affecting claude.ai, Claude API - api.anthropic.com, Claude Code, and Claude Cowork. It started 2026-10-25 06:14 UTC and remained under investigation when archived, open for 0 min at the last update.