Degraded performance for multiple models

Event timeline

How this incident unfolded, from the official status page.

1. Investigating

   2 months ago

   Anthropic

   We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.

2. Investigating

   2 months ago

   Anthropic

   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.

3. Investigating

   2 months ago

   Anthropic

   We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.

4. Monitoring

   2 months ago

   Anthropic

   A fix has been implemented and we are monitoring the results.

5. Resolved

   2 months ago

   Anthropic

   The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.