Anthropic Outage History

Claude.ai experienced elevated errors for 38 minutes, affecting users' ability to access or use the service normally. Anthropic implemented a fix and monitored the results before confirming full resolution of the incident.

Anthropic experienced elevated errors affecting Claude Opus 4.6 and Sonnet 4.6 models across both claude.ai and api.anthropic.com for 2.9 hours. Users reported that Claude crashed and would not respond to queries during the outage. The incident was resolved after investigation and remediation efforts.

Anthropic's Claude Sonnet 4.6 experienced elevated errors starting at 9:27 PT, affecting both claude.ai and api.anthropic.com services. This was a repeat of an earlier issue that occurred the same day. The incident was resolved after 3.3 hours of service disruption.

Anthropic's Claude.ai service experienced elevated errors and login issues for 2.8 hours, with Claude Code also affected by login/logout problems. Users reported constant network errors and slower than usual performance during the incident. The issue was identified and resolved with errors returning to baseline levels, while the Claude API remained unaffected throughout the incident.

The Claude Desktop app became unresponsive for users with scheduled tasks in Claude Cowork or Claude Code who were in timezones observing daylight saving time, caused by an infinite loop when the app couldn't resolve tasks scheduled during the "skipped" hour. The incident affected desktop functionality for 47 hours, with scheduled tasks disabled during the outage. The issue was resolved through app version 1.1.5749 and backend fixes.

Anthropic experienced elevated error rates with Claude Haiku 4.5 between 5:35-6:44 PT (13:35-14:44 UTC) on March 7, 2026. The issue affected both claude.ai and api.anthropic.com services for approximately 1 hour and 9 minutes. The service has been restored to baseline error rates.

The Filesystem connector disappeared from Claude Desktop, preventing users from accessing file system functionality through the application. The issue affected claude.ai for 46.6 hours before being identified and fixed. Users needed to manually re-add the Filesystem connector to their organization allowlist to restore functionality after the fix was implemented.

Anthropic's API experienced connection timeouts for some requests to api.anthropic.com due to network degradation at an upstream peering point, affecting claude.ai for 50 minutes. Requests that successfully established connections continued to work normally. The issue was resolved by implementing a fix in coordination with upstream providers.

Anthropic experienced elevated errors with Claude Haiku 4.5 that affected both claude.ai and api.anthropic.com for 1.1 hours. The service team implemented a fix and monitored the results before confirming that error rates returned to baseline levels. This was a recurrence of previously resolved issues with the Haiku 4.5 model.

Anthropic experienced elevated errors with Claude Haiku 4.5 for approximately 10 minutes, affecting both claude.ai and api.anthropic.com between 6:45-6:50 PT (14:45-14:50 UTC) on March 4, 2026. The incident was classified as minor and has been resolved.