Claude.ai and Claude Code login errors spiked on April 13, 2026
This incident appears to have been more authentication-heavy than a full Claude platform failure, with login issues concentrated in a relatively short window.
Published: Apr 13, 2026, 11:31 AM EDT
Updated: Apr 21, 2026, 8:40 AM EDT
Incident started: Apr 13, 2026, 11:31 AM EDT
Crowd spike noticed: Apr 13, 2026, 11:35 AM EDT
Resolved: Apr 13, 2026, 12:19 PM EDT
Affected surface: Claude.ai login and Claude Code login
Official incident notes described elevated login errors on Claude.ai and Claude Code and later said the login issue had been resolved within the same hour.
- Users could hit authentication failures without a full platform-wide collapse.
- The issue window was shorter than some of the broader April outages.
- The pattern matches why a detector should separate login failures from wider inference or upload problems.
A reviewed note on the April 13, 2026 Claude incident that primarily affected login on Claude.ai and Claude Code.
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: