Anthropic is actively investigating elevated error rates impacting its flagship Claude AI service, according to a live incident report published on the company's official status page. The outage, first reported at 12:21 UTC on May 13, 2026, affects both claude.ai and Claude Code—the company's command-line development tool that lets developers integrate AI assistance directly into their coding workflows.

What's Affected

The incident encompasses two core products in Anthropic's lineup. The primary web interface at claude.ai is experiencing problems, preventing users from accessing the conversational AI through their browsers. Simultaneously, Claude Code—Anthropic's CLI tool designed for developer workflow integration—is also affected by elevated error rates, meaning developers who rely on AI-assisted coding directly within their terminals are running into issues.

Current Status

At publication time, Anthropic's status page shows the incident is still under active investigation. The latest update, posted approximately 40 minutes after the initial alert at 12:59 UTC, states that engineers are 'continuing to investigate this issue.' No estimated resolution time has been provided, and the company has not yet identified a root cause.

User Impact

While official user impact metrics aren't available from the status page, Hacker News threads and social media reports suggest widespread disruption. Developers who depend on Claude Code for real-time code completion, refactoring assistance, and debugging support are currently without that capability—potentially significant for teams with workflows tightly integrated around AI-assisted development.

Key Takeaways

  • Incident first reported at 12:21 UTC; investigation ongoing as of 13:00 UTC
  • Both claude.ai web interface and Claude Code CLI tool affected by elevated error rates
  • Anthropic has not provided estimated resolution timeline or root cause details
  • Developer community actively monitoring situation on Hacker News and social platforms

The Bottom Line

This is a rough look for Anthropic right now—Claude Code users especially feel the pain since that tool's value proposition hinges on always-on reliability. When your AI coding assistant goes down mid-sprint, it exposes exactly how much some teams have centralized around these tools. We'll be watching for updates and will report when Anthropic provides more concrete details on what's causing this.