Degraded performance for multiple models

Incident Report for Claude

Update

We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.
Posted Aug 18, 2026 - 16:20 UTC

Investigating

We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.
Posted Aug 18, 2026 - 16:20 UTC
This incident affects: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.
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