Elevated errors across many models

What to do

• Check whether you use Anthropic claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork. 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 2h 3m it lasted.

  Anything that failed between 2026-06-16 17:29 UTC and 2026-06-16 19:32 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 7

1. investigatingJun 16, 2026, 5:29 PM UTC

   We are currently investigating this issue.

   provider

2. monitoringJun 16, 2026, 6:00 PM UTC

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

   provider

3. identifiedJun 16, 2026, 6:15 PM UTC

   We are still seeing errors on Opus 4.8 and Haiku 4.5.

   provider

4. identifiedJun 16, 2026, 7:00 PM UTC

   We are continuing to work to resolve an elevated rate of errors on requests to Claude Opus 4.8, and will provide an additional update as soon as possible.

   provider

5. identifiedJun 16, 2026, 7:08 PM UTC

   We are continuing to work on a fix for this issue.

   provider

6. monitoringJun 16, 2026, 7:22 PM UTC

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

   provider

7. resolvedJun 16, 2026, 7:32 PM UTC

   The incident has now been resolved. We had two phases: * between 10:23 PT / 17:23 UTC to 11:00 PT / 18:00 UTC -- all Sonnet and Opus models were affected, reaching an error rate of around 10% * after 11:00 PT / 18:00 UTC and until 12:20 PT / 19:20 UTC -- Opus 4.8 had an average error rate of 10% The incident is now resolved.

   provider

Corrections

None so far.

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