Anthropic Outage History

Anthropic experienced elevated errors on Claude Opus 4.6 that affected claude.ai, console.anthropic.com, and api.anthropic.com for 1.3 hours. The issue was identified and a fix was implemented. The incident has been resolved.

Anthropic experienced elevated errors across claude.ai, console.anthropic.com, and api.anthropic.com for 4 hours on March 2nd, 2026. The incident primarily affected the Claude.ai platform and login/logout functionality, with some API methods also experiencing issues. The problem was identified and fixed, with the service fully restored after monitoring confirmed the resolution.

Anthropic experienced elevated error rates on Claude Opus 4.6 between 17:50-18:12 UTC, affecting both claude.ai and api.anthropic.com services. The issue lasted 29 minutes and has been resolved.

Anthropic's claude.ai service experienced elevated errors for 2.9 hours, causing a major service disruption. The incident affected the claude.ai platform, preventing or degrading user access to the service. A fix was implemented and the service was restored to normal operation with continued monitoring.

Anthropic experienced elevated error rates with Sonnet 4.6 that affected claude.ai, console.anthropic.com, and api.anthropic.com for 14 minutes. The incident was classified as minor and has been resolved.

Anthropic experienced a major incident where new users were unable to log into the Claude Desktop app, affecting the claude.ai service. The login issues prevented new users from accessing the desktop application for 3.4 hours. The incident has been resolved and Anthropic continued monitoring to ensure no further issues occurred.

Anthropic's claude.ai service experienced elevated errors for 4.1 hours, causing a major service disruption. The incident affected the claude.ai platform, preventing or degrading user access to the AI assistant. The issue was resolved after implementing a fix and monitoring the results.

Anthropic experienced elevated errors on claude.ai that lasted 14 minutes. The incident affected the claude.ai service and was resolved after investigation. The service was restored to normal operation.

Claude Code version 2.1.59 introduced a bug causing Windows users to experience "JSON Parse error: Unexpected EOF" messages and excessive file writes due to write contention issues with the .claude.json global config file. The issue affected Windows users for 3.2 hours and was resolved with the release of version 2.1.61, which users could obtain by running `claude update`.

Anthropic experienced a 22.5-hour outage in usage reporting that affected the Console, admin API endpoints, and analytics dashboards across claude.ai, console.anthropic.com, and api.anthropic.com from February 26 to February 27, 2026. The outage was caused by an internal data service issue that resulted in errors and missing usage data for the affected period. All endpoints have been restored and historical data is now displaying correctly.