- Level
- confirmed
- Worst impact
- Degraded
- Components
- claude.ai, Claude API (api.anthropic.com)
- Down Index
- 37of 100
What to do
Check whether you use Anthropic claude.ai, Claude API (api.anthropic.com). Check your stack
Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.Confirm your retries, queues and scheduled jobs caught up after the 21m it lasted.
Anything that failed between 2026-04-28 12:24 UTC and 2026-04-28 12:45 UTC may need a replay.Subscribe to Anthropic's feed to hear about the next one first. RSS feed
https://down.guide/feed?provider=anthropic works in Slack (/feed subscribe), Discord feed bots and any RSS reader.
Updates from Anthropic 3
- investigating
We are currently investigating this issue.
provider
- monitoring
A fix has been implemented and we are monitoring the results.
provider
- resolved
The incident has now been resolved. The elevated error rate for Haiku 4.5 was between 4:53 PT / 11:53 UTC and 5:36 PT / 12:44 UTC.
provider
Reports count in aggregate; nothing about you is shown.
Corrections
None so far.
Something wrong on this page? Report an error or send us a note. Every fix is listed here.
Questions about DWN-51995f94ea
Is Anthropic still down?
No, this incident was resolved 2026-04-28 12:45 UTC. For Anthropic's live state, see https://down.guide/anthropic.
How long did it last?
21m, from 2026-04-28 12:24 UTC to 2026-04-28 12:45 UTC, by the times Anthropic posted.
What was affected?
Anthropic named claude.ai, Claude API (api.anthropic.com).
What caused it?
Anthropic hasn't published a root cause. If it does, it shows here.
Where does this come from?
Anthropic's official status page, https://status.claude.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.