Claude Models Hit by Elevated Errors; Anthropic Identifies Cause

Elevated Errors for Multiple Models

Claude Models Hit by Elevated Errors; Anthropic Identifies Cause

Anthropic is investigating and has identified the cause of elevated errors affecting requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, and Claude Opus 4.8. The incident impacts claude.ai, the Claude API, Claude Code, and Claude Cowork. A fix is in progress, with updates to follow.

We have identified the cause of elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, and other Claude models and are working on a fix.

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2026-08-24