Anthropic change history: Elevated errors on requests to multiple models

Anthropic reported a major incident involving elevated errors on requests to some Claude models, affecting claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork. It started at 2026-08-20 19:16 UTC and was resolved at 2026-08-20 19:42 UTC, lasting 26 min; no cause or specific fix was stated.