Krux
April 7, 2026
Claude Down Globally for Hours, Second Major Outage Since March
Published: April 7, 2026 at 12:35 AM
Updated: April 7, 2026 at 12:35 AM
100-word summary
Anthropic's Claude went dark for over 90 minutes on April 6, blocking logins and breaking chat features across its web app, mobile, and Claude Code developer tools. Over 4,000 outage reports flooded Downdetector as enterprise workflows ground to a halt. The company identified the issue at 15:45 UTC and applied a fix, though recovery is still ongoing. This marks Claude's second major reliability incident since late March, when multiple outages hit both Opus 4.6 and Sonnet 4.6. Anthropic hasn't explained what keeps breaking. For a platform positioning itself as enterprise-grade, repeated outages are a credibility problem competitors will happily exploit.
What happened
Anthropic's Claude went dark for over 90 minutes on April 6, blocking logins and breaking chat features across its web app, mobile, and Claude Code developer tools. Over 4,000 outage reports flooded Downdetector as enterprise workflows ground to a halt. The company identified the issue at 15:45 UTC and applied a fix, though recovery is still ongoing. This marks Claude's second major reliability incident since late March, when multiple outages hit both Opus 4.6 and Sonnet 4.6. Anthropic hasn't explained what keeps breaking.
Why it matters
For a platform positioning itself as enterprise-grade, repeated outages are a credibility problem competitors will happily exploit.