Sonnet 4.6 saw elevated errors on April 6, 2026
This was a brief model incident, but it still matters historically because it continued the run of Sonnet 4.6-specific reliability problems in early April.
Published: Apr 6, 2026, 5:26 PM EDT
Updated: Apr 21, 2026, 8:40 AM EDT
Incident started: Apr 6, 2026, 5:26 PM EDT
Crowd spike noticed: Apr 6, 2026, 5:30 PM EDT
Resolved: Apr 6, 2026, 5:45 PM EDT
Affected surface: Claude Sonnet 4.6 requests
Official status updates said Sonnet 4.6 was seeing elevated error rates on April 6 before the issue was resolved later that evening.
- The event was short, but it reinforced that Sonnet 4.6 was a recurring point of instability in early April.
- Short model incidents can still waste significant debugging time for active developers.
- This is the sort of recurring pattern a historical archive should make visible.
A reviewed note on the short April 6, 2026 Sonnet 4.6 incident affecting one model family rather than all Claude products.
Review the methodology page for how crowd reports are deduplicated and the status lag explainer for how independent reports differ from provider updates.
If you want the broader archive context, go back to the Claude outage history page.
Related notes in the same incident category: