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Anthropic Outage History

Every past Anthropic outage tracked by IsDown, with detection times, duration, and resolution details.

There were 637 Anthropic outages since March 2024. The 398 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major March 18, 2026

March 2026: Elevated errors on Claude.ai

Detected Mar 18, 2026 8:25 PM EDT · Resolved Mar 18, 2026 8:33 PM EDT · Duration 8 minutes

Anthropic experienced elevated errors across Claude.ai, console.anthropic.com, and api.anthropic.com for 8 minutes on March 19, 2026. The incident was classified as major and affected all primary user-facing services. The team investigated the issue but no resolution details were provided in the available updates.

Major March 18, 2026

March 2026: Elevated errors on Claude.ai

Detected Mar 18, 2026 11:16 AM EDT · Resolved Mar 18, 2026 12:06 PM EDT · Duration about 1 hour

Anthropic's Claude.ai experienced elevated errors for 50 minutes, affecting the main service and Claude Code login/logout functionality. The incident was classified as major and impacted users' ability to access and use the platform normally. A fix was implemented and monitored before the issue was fully resolved.

Major March 18, 2026

March 2026: Increased errors on Opus 4.6

Detected Mar 18, 2026 8:30 AM EDT · Resolved Mar 18, 2026 10:00 AM EDT · Duration about 2 hours

Anthropic experienced increased errors on Opus 4.6 that affected claude.ai, console.anthropic.com, and api.anthropic.com for 1.5 hours. The company implemented a fix and monitored the results before resolving the incident. All affected services were restored to normal operation.

Major March 18, 2026

March 2026: Elevated errors on Claude Opus 4.6

Detected Mar 18, 2026 2:41 AM EDT · Resolved Mar 18, 2026 5:47 AM EDT · Duration about 3 hours

Anthropic experienced elevated errors on Claude Opus 4.6 that affected claude.ai, console.anthropic.com, and api.anthropic.com for 3.1 hours. The incident was classified as major and impacted users' ability to access Claude services across multiple platforms. A fix was implemented and the service was restored to normal operation.

Major March 17, 2026

March 2026: Elevated errors on Claude Opus 4.6

Detected Mar 17, 2026 3:47 PM EDT · Resolved Mar 17, 2026 8:29 PM EDT · Duration about 5 hours

Anthropic experienced elevated errors on Claude Opus 4.6 for 4.7 hours, affecting claude.ai, console.anthropic.com, and api.anthropic.com. The issue was identified and mitigations were employed during investigation, with a fix implemented and monitored before full resolution.

Minor March 17, 2026

March 2026: Elevated errors on Claude Sonnet 4.6

Detected Mar 17, 2026 10:07 AM EDT · Resolved Mar 17, 2026 11:48 AM EDT · Duration about 2 hours

Anthropic experienced elevated errors on Claude Sonnet 4.6 that specifically impacted free Claude.ai users for 1.7 hours. The issue was identified and a fix was implemented, with the service being monitored before full resolution was confirmed.

Minor March 17, 2026

March 2026: Elevated errors on Claude Opus 4.6

Detected Mar 17, 2026 5:46 AM EDT · Resolved Mar 17, 2026 7:47 AM EDT · Duration about 2 hours

Anthropic experienced elevated errors on Claude Opus 4.6 that affected claude.ai, console.anthropic.com, and api.anthropic.com for approximately 2 hours. The issue was identified and a fix was implemented, with the incident being fully resolved after monitoring confirmed the solution was effective.

Minor March 17, 2026

March 2026: Elevated errors on Claude Sonnet 4.6

Detected Mar 17, 2026 4:04 AM EDT · Resolved Mar 17, 2026 9:03 AM EDT · Duration about 5 hours

Anthropic experienced elevated errors on Claude Sonnet 4.6 that affected claude.ai for 5 hours, with the impact initially limited to free Claude.ai users. The issue was identified and a fix was implemented, with the incident fully resolved after monitoring confirmed the solution was effective.

Minor March 16, 2026

March 2026: Elevated errors on Claude Sonnet 4.6

Detected Mar 16, 2026 10:02 AM EDT · Resolved Mar 16, 2026 12:35 PM EDT · Duration about 3 hours

Anthropic experienced elevated error rates on Claude Sonnet 4.6 that specifically impacted free tier users across claude.ai, console.anthropic.com, and api.anthropic.com. The issue was identified and a fix was implemented over the course of 2.6 hours. The incident has been resolved.

Minor March 16, 2026

March 2026: Elevated errors on Claude.ai

Detected Mar 16, 2026 9:56 AM EDT · Resolved Mar 16, 2026 10:23 AM EDT · Duration 27 minutes

Anthropic experienced elevated errors on Claude.ai for 27 minutes on March 16, 2026. The incident affected the Claude.ai web interface and was resolved after investigation. The service disruption was classified as minor and has been fully restored.