Anthropic’s Claude Hit by Disruption, App and API Down

Claude users ran into a messy stretch of downtime on Wednesday as Anthropic’s AI chatbot showed signs of a partial outage across the app and public API.

Quick Summary – TLDR:

• Thousands of users reported problems with Claude on Downdetector, with reports climbing as the day went on.
• Users flagged Claude chat issues, Claude Desktop app failures, and API 500 errors tied to Claude’s servers.
• Anthropic’s status page acknowledged a partial outage, and the company said it identified an issue and deployed a fix.
• Some users were told to update Claude Desktop to v1.1.4328 or reinstall the app, especially on Windows.

What Happened?

Reports of trouble accessing Claude started building Wednesday morning, with users describing everything from chat not working to error messages tied to the public API. Downdetector logs showed a fast rise in complaints, while Anthropic’s own status page pointed to a partial outage and ongoing investigation.

Claude down for anyone else? pic.twitter.com/weSyaJjpDo

— Akshat Khandelwal (@akshatk7) February 25, 2026

A spike in reports, then another surge

The disruption appeared to unfold in waves. One set of reports said users began noticing problems around 7:30 AM ET, and by noon ET Downdetector had logged more than 1,200 reports of issues. Another snapshot later in the morning showed the situation growing quickly, with more than 4,000 users reporting problems by 9:11 AM PST.

From there, the numbers kept climbing. By 9:18 AM PST, Claude’s status checker listed an investigation into “500s for public-api.” Around that time, Downdetector reports rose past 6,000. Later, after a brief dip, user reports climbed again, reaching roughly 10,000 at one point.

A separate Downdetector view focused on U.S. users showed a peak of over 5,000 reports around 1:20 PM ET, followed by a decline to around 2,500 reports by 1:40 PM ET. The shifting report levels suggested the service might have been unstable, partially recovering, then slipping again for some users.

What users said they were seeing?

People reporting problems described a mix of failures depending on how they used Claude.

Downdetector breakdown data included:

• 45% reporting issues with Claude chat
• 25% reporting issues with Claude code
• 19% reporting issues with the Claude app

A key theme was the API 500 error, which generally points to a server side failure, meaning the issue sits on the service provider’s systems rather than on a user’s device or connection.

Anthropic points to Desktop app issues on Windows

Anthropic acknowledged trouble on Claude’s status page and described the overall situation as a partial outage. In one update, the company said it had identified an issue affecting the Claude Desktop application and was working to deploy a fix.

Later, Anthropic said the Claude Desktop app had been failing to open for some Windows users, and that a fix had been deployed while the team monitored error rates. Users still having trouble were encouraged to update to Claude Desktop v1.1.4328 or reinstall the application.

SQ Magazine Takeaway

I look at outages like this as a reminder that AI tools are not utilities yet, even if we treat them that way. When a chatbot and its public API both wobble in the same day, it hits everyone, casual users, developers, and teams shipping real work. If you rely on Claude for anything important, I think you should plan for failure by keeping a backup model, saving prompts locally, and not building workflows that collapse the second an AI tab stops responding. Convenience is great, but resilience is better.