Anthropic Outage History

Anthropic Claude.ai experienced a brief partial outage affecting a subset of Claude.ai organizations that could not submit messages. The incident began at 7:13 PM UTC and lasted about 15 minutes, with services restored by 7:28 PM UTC. The Claude.ai component was the focus of the disruption, described as degraded submission capability for the affected orgs. Status page updates documented the investigation and the subsequent restoration.

Anthropic Claude API experienced a brief connectivity issue related to MCP Connectors, causing degraded access to api.anthropic.com and claude.ai for about 55 minutes. The incident began at Sep 4, 2025 4:38 PM UTC with an investigation notice and was resolved by Sep 4, 2025 5:33 PM UTC when service returned to normal. The provider issued 2 status updates during the incident describing the investigation and restoration steps, and the impact was limited to two components: api.anthropic.com and claude.ai.

The Claude Haiku 3.5 service experienced elevated errors resulting in degraded performance across related endpoints. The issue affected four components: console.anthropic.com, api.anthropic.com, claude.ai, and Claude Code. The incident began at 1:00 PM UTC, with the status page indicating investigation around 1:58 PM UTC and the problem was resolved by 3:03 PM UTC. The provider issued two status updates during the incident, documenting the investigation and restoration.

Two status updates were issued during the incident, at 1:58 PM UTC and 3:03 PM UTC. Claude Haiku 3.5 services were restored by 3:03 PM UTC after roughly 2 hours and 3 minutes of degraded operation.

Claude Sonnet 4.0 experienced elevated errors that degraded performance across multiple surfaces: console.anthropic.com, api.anthropic.com, Claude Code, and claude.ai. The issue began at Sep 4, 2025 6:25 AM UTC (06:25 UTC / 23:25 PT), and a small number of users reported issues around 6:30 AM UTC. The outage lasted about 38 minutes before recovery.

The incident began on Sep 3, 2025 6:43 AM UTC when four Claude components were listed as degraded: claude.ai, console.anthropic.com, api.anthropic.com, and Claude Code. The Claude status page showed elevated errors and noted that the team was Investigating, with users potentially experiencing errors or degraded functionality across the Claude AI interface, API endpoints, the console, and Claude Code during this period.

The incident affected Anthropic Claude services, including the API endpoints (api.anthropic.com), the Claude Code environment, claude.ai, and the console at console.anthropic.com. Users reported elevated error rates and degraded performance when accessing API calls or using Claude AI features. The issue impacted four components across the Claude ecosystem, with no clear regional pattern indicated. The outage began at Sep 3, 2025 1:38 AM UTC and lasted about 25 minutes.

The Anthropic Claude Sonnet 3.6 service experienced degraded performance beginning at 6:10 AM UTC (23:10 PT). The issue affected four components including console.anthropic.com, claude.ai, api.anthropic.com, and Claude Code, leading to elevated errors for users interacting with Claude Sonnet 3.6. The outage lasted roughly 2 hours and 48 minutes, with users likely experiencing failed requests and slower responses. The Claude status page listed a degraded state at Sep 1, 2025 7:18 AM UTC and normal service was restored by Sep 1, 2025 8:58 AM UTC after two official updates.

Anthropic's Claude.ai component experienced a brief startup outage that prevented Claude.ai Research tasks from starting and disrupted early research work. The incident began at Aug 31, 2025 5:13 PM UTC when Claude.ai was listed in a degraded state, and a rapid sequence of status updates followed as the issue was investigated. The outage lasted about 1 hour and 10 minutes and was resolved by Aug 31, 2025 6:23 PM UTC, with Claude.ai returning to normal operation. The provider issued two official updates during the incident documenting the investigation and recovery as services were restored.

Anthropic Claude Sonnet 4.0 experienced elevated errors affecting Claude Code, claude.ai, console.anthropic.com, and api.anthropic.com, leading to degraded responses for users interacting with Claude Sonnet 4.0 features. The outage began at Aug 31, 2025 5:30 AM UTC and lasted about 2 hours and 33 minutes, ending with service restoration at Aug 31, 2025 8:03 AM UTC.

The Claude Sonnet 4.1 incident caused elevated errors across Claude components including claude.ai, api.anthropic.com, console.anthropic.com, and Claude Code. The issue began at 5:30 AM UTC. The Claude status page indicated a degraded service at Aug 30, 2025 7:08 AM UTC and restoration occurred by Aug 30, 2025 9:23 AM UTC after about 2 hours and 15 minutes. The Claude status page issued 2 updates during the incident.