**Claude experienced elevated error rates across multiple models on July 16, 2026, affecting both claude.ai and api.anthropic.com for approximately 4.3 hours (11:30 AM–3:15 PM PT).** The majority of errors occurred within the first hour, with Claude Fable 5 and Mythos 5 being the last models to recover. The issue was identified and resolved, with success rates returning to normal by 3:15 PM PT.
This issue has been resolved. From 11:30am PT / 18:30 UTC through to 3:15pm PT / 22:15 UTC some users experienced elevated errors on requests to Claude Models. Most errors were experienced within the first hour of the impact window.
We have seen success rates recover and are continuing to monitor closely to ensure no further issues. We will provide an additional update shortly.
At this time, we are seeing recovery on requests to most models. We are continuing to see elevated errors on requests to Claude Fable 5 and Mythos 5, and are working to resolve these remaining issues. We will provide an additional update as soon as possible.
We are continuing to work to resolve issues resulting in elevated errors on requests to some Anthropic models. We will provide additional updates as soon as possible.
We have identified the cause of elevated errors on requests to multiple models, and are working to resolve this issue. We will provide an update as soon as possible.
We are investigating elevated errors on requests to multiple models. We will provide an update as soon as possible.
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