Discussion Hub for new Claude incident: Degraded performance for multiple models on Aug 18, 2026

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. Aug 18, 16:20 UTC Investigating - We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible. Aug 18, 16:20 UTC Post flair and post body will be updated as the incident report is updated by Anthropic. This discussion post will be removed from subreddit highlights one hour after the incident is resolved. View this incident on status.claude.com