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Anthropic · AIApr 8, 2026, 06:23 UTC 7 months ago

Sonnet 4.6 elevated rate of errors

MajorNot disclosedUpdated 47d ago
Apr 8, 06:23 UTCApr 8, 09:33 UTC
Duration
3h 10m
Impact
Major
Root cause
Not disclosed
Anthropic, 90 days
49 incidents
Affected
Not listed by the vendor.
Status page

Final update

The incident is now resolved. Sonnet 4.6 exhibited errors above baseline between 23:00 PT / 7:00 UTC and 1:50 PT / 9:50 UTC.

Timeline

  1. Resolved · Apr 8, 09:33 UTC
    The incident is now resolved. Sonnet 4.6 exhibited errors above baseline between 23:00 PT / 7:00 UTC and 1:50 PT / 9:50 UTC.

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Full history