Anthropic experienced a major incident on July 30, 2026 affecting claude.ai and Claude API (api.anthropic.com) and 1 more component, lasting 4h 51m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 30, 2026, 05:57 AM UTC
We are currently investigating this issue.
- identified Jul 30, 2026, 06:26 AM UTC
All models except Opus 5 have recovered. We're working to recover Opus 5 as well.
- identified Jul 30, 2026, 07:33 AM UTC
As of 7:32 UTC / 0:32 PT, Opus 5 errors are back to baseline but we're seeing again Sonnet 5's errors up.
- identified Jul 30, 2026, 08:06 AM UTC
As of 8:05 UTC / 1:05 PT, Sonnet 5 errors are back to baseline, but we're seeing an increased error rate on Fable 5.
- identified Jul 30, 2026, 08:33 AM UTC
As of 01:33 PT / 08:33 UTC we are back to errors across all models.
- monitoring Jul 30, 2026, 10:03 AM UTC
As of 2:58 PT / 9:58 UTC the errors are back to baseline.
- monitoring Jul 30, 2026, 10:23 AM UTC
We are also investigating issues with Opus 4.7 and Opus 4.5.
- resolved Jul 30, 2026, 10:48 AM UTC
This incident has been resolved.