Elevated errors for multiple models

Event timeline

How this incident unfolded, from the official status page.

1. Investigating

   2 months ago

   Anthropic

   We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, and Claude Opus 4.8. We will provide an update as soon as possible.

2. Identified

   2 months ago

   Anthropic

   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. We will provide an update as soon as possible.

3. Identified

   2 months ago

   Anthropic

   We are continuing to work to resolve issues causing elevated requests on multiple models. We will provide an update as soon as possible.

4. Identified

   2 months ago

   Anthropic

   At this time, we have seen errors stabilize on Opus 5 and Fable 5, and are working to fully resolve success rates on all affected models. We will provide an update as soon as possible.

5. Resolved

   2 months ago

   Anthropic

   This issue has been resolved. From 9:50pm PT / 04:50 UTC through 00:36am PT / 07:36 UTC, users saw elevated errors on requests to Claude models, including Claude Opus 5 and Fable 5.