Anthropic opened an investigation into elevated errors affecting five Claude models on October 25, 2026, posting an incident on the Claude Status page at 06:14 UTC that lists claude.ai, the Claude API, Claude Code, and Claude Cowork as affected services. Incident Scope and Status The incident, titled “Elevated errors for multiple models,” was published in Investigating status. In the posted update, Anthropic said it was investigating elevated errors on requests to Claude Mythos 5.1, Claude…