Outage in Claude
Elevated error rates on Opus 4.6
Resolved MajorIncident Report
Summary AI Generated
Claude's Opus 4.6 model experienced elevated error rates for 9.8 hours, affecting claude.ai, console.anthropic.com, and api.anthropic.com. During the incident, Sonnet 4.6 also temporarily showed elevated errors but was restored to normal operation after about 7 hours. The main issue was mitigated and error rates returned to baseline levels.
We are currently investigating this issue.
Components affected
Claude claude.ai Claude console.anthropic.com Claude api.anthropic.comLatest Updates ( sorted recent to last )
RESOLVED
2 days ago - at 03/27/2026 04:46PM
This incident has been mitigated as of 9:30 PT / 16:30 UTC.
MONITORING
2 days ago - at 03/27/2026 01:46PM
As of 6:40 PT / 13:40 UTC our error rate has returned to the baseline. We are still monitoring the current situation.
IDENTIFIED
2 days ago - at 03/27/2026 01:34PM
We have mitigated the main issue and the error rate for Opus 4.6 is hovering around 0.4% which is still high, but much better than the performance during the previous hours. We are waiting for a more permanent fix to land in the near future.
INVESTIGATING
2 days ago - at 03/27/2026 12:09PM
As of 5:00 PT / 12:00 UTC Sonnet 4.6 is now healthy. We are still working to fix Opus 4.6.
INVESTIGATING
2 days ago - at 03/27/2026 11:21AM
Sonnet 4.6 is also showing elevated errors.
INVESTIGATING
2 days ago - at 03/27/2026 11:04AM
We are continuing to investigate the ongoing incident.
INVESTIGATING
2 days ago - at 03/27/2026 06:59AM
We are currently investigating this issue.
Latest Claude outages
Dispatch sessions not responding in Claude Desktop - about 14 hours ago
Elevated errors for MCP calls - 3 days ago
Elevated errors on Claude Opus 4.6 and Sonnet 4.6 - 3 days ago
Elevated errors on Claude Opus 4.6 - 4 days ago
Elevated Errors on claude.ai - 4 days ago
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