Claude change history: Elevated errors for Claude Sonnet 5

Claude reported a major incident involving elevated Claude Sonnet 5 request errors across claude.ai, Claude API (api.anthropic.com), Claude Code and Claude Cowork. The incident started at 2026-09-02 21:17 UTC and was resolved at 2026-09-02 21:44 UTC (computed duration: 26 min); the vendor stated actual impact occurred from 21:05 UTC to 21:19 UTC.