Anthropic Outage History

Anthropic's Claude.ai Research experienced a brief outage that impacted task execution for some users. Reports described tasks failing to run and pages remaining on loading. The incident began at 2:58 PM UTC and was resolved by 6:38 PM UTC, lasting about 3 hours and 40 minutes. A user in Recife, Brazil noted that tasks did not execute and loading stayed indefinite during the event.

On Anthropic's status page, Claude.ai showed a degraded condition as the issue was investigated and then restored to normal. The disruption was limited to Claude.ai Research, with no indication of broader impact on other components. The situation was resolved with Claude.ai returning to normal operation after the final update.

Users reported degraded functionality affecting Claude Code remote and claude.ai file creation, disrupting workflows that rely on remote code execution and file creation. Reports began around 1:15 PM UTC, with additional observations by 1:30 PM UTC indicating ongoing impact. The Claude status page listed a degraded performance starting at Nov 17, 2025 2:03 PM UTC for two components: claude.ai and Claude Code, with the issue under investigation.

Two official status updates were issued during the incident, and Claude returned to normal after about 45 minutes, with the status changing back to up by Nov 17, 2025 2:48 PM UTC. The impact appeared confined to the claude.ai and Claude Code components, with no broader regional disruption indicated.

Anthropic Claude experienced a brief degraded period beginning at Nov 14, 2025 9:58 AM UTC and ending at Nov 14, 2025 10:48 AM UTC due to elevated errors for requests to Claude 4.1 Opus. The issue affected four components — platform.claude.com, claude.ai, Claude Code, and Claude API — causing errors for a portion of users during the incident. The incident lasted about 50 minutes, and Anthropic published two status updates as they investigated. The affected components were restored to normal by the end of the incident.

An outage impacted Anthropic Claude API access and Claude Code, starting at 12:10 AM UTC. Users reported being unable to send messages and encountering 500 Internal Server Errors, affecting Claude's API and Claude Code features. StatusGator detected the issue at Nov 14, 2025 12:10 AM UTC, about 8 minutes before any official acknowledgment, and an Early Warning Signal was active from 12:10 AM UTC to 12:18 AM UTC.

Claude.ai experienced elevated errors beginning around 20:53 UTC, causing degraded performance for users worldwide. Reported symptoms included chat load failures, server errors, and the inability to send or retrieve queries across regions such as North America, Europe, Africa, and Asia-Pacific. The incident appeared global in scope, with a noticeable surge in user reports before service began returning to normal.

Anthropic Claude experienced an outage that made chat and Usage view features unavailable due to server errors. The disruption began at 2:18 AM UTC and was resolved by 3:41 AM UTC. Users across multiple regions reported chat unresponsive and problems accessing usage data from both mobile and desktop clients. StatusGator detected the issue from user reports at Nov 11, 2025 2:18 AM UTC, indicating early visibility before any official acknowledgement.

Anthropic Claude Sonnet 4.5 and related services experienced elevated errors, affecting requests to Claude AI, Claude Code, platform.claude.com, and the Claude API. Users reported failures and degraded responses, indicating a multi-service impact across the Claude family. The incident was first acknowledged by Anthropic at Nov 7, 2025 6:57 AM UTC with an investigation, followed by a status change to degraded at Nov 7, 2025 6:58 AM UTC.

Two status updates were issued during the incident as the team investigated and worked to remediate. The services returned to normal by Nov 7, 2025 7:48 AM UTC, marking an outage duration of roughly 50 minutes from degradation to resolution. The affected components included claude.ai, Claude Code, platform.claude.com, and Claude API, showing a coordinated impact across multiple Claude offerings.

Anthropic's Claude API, platform.claude.com, and claude.ai experienced a brief degradation beginning at 6:23 AM UTC and resolved by 6:38 AM UTC. During the window, requests to Claude 4 Sonnet returned errors, causing degraded performance for users interacting with Claude services across the API and related platforms.

The outage began at 10:23 AM UTC with elevated errors on claude.ai. A later status update noted issues for Claude 4.1 Opus and indicated platform.claude.com and Claude API were degraded. By 10:58 AM UTC the incident was listed as degraded for claude.ai, signaling broader problems with authentication and API access affecting sign-in and OAuth flows.

User reports showed widespread sign-in and OAuth failures across many regions, including login errors and CLI authentication problems. The service provider issued 5 status updates during the incident, and a fix was implemented by 11:22 AM UTC with monitoring continuing through 11:23 AM UTC. Claude components began returning to normal as fixes took effect, and claude.ai moved back to a healthy state by 3:08 PM UTC.

The Anthropic Claude 4 Sonnet services experienced a brief period of elevated errors that affected login and request flows. The outage impacted three components: platform.claude.com, claude.ai, and Claude API (api.anthropic.com). Users reported sign-in problems and rate-limited responses during the incident. The outage began at Oct 31, 2025 9:28 AM UTC and lasted about 20 minutes, with services restored by Oct 31, 2025 9:48 AM UTC.

The Claude team issued two status updates during the incident, noting ongoing investigation and eventual restoration as services recovered. Reports from users worldwide indicated a broad impact on authentication and API usage during the event.