Microsoft's outage takes down rival AI chatbot Claude
Microsoft's outage cripples rival AI.
Claude logo on phone. Image by Nur Photo/Getty Images.
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- Thousands of users reported problems accessing Claude as Microsoft's outage entered its second day.
- Anthropic said Claude.ai, Claude Code, and its developer platform had elevated errors.
- Downdetector logged about 3,800 Claude problem reports before reports dropped sharply within minutes.
- Microsoft said increased infrastructure load caused its outage and found no sign of cyber activity.
Key Takeaways by nexos.ai, reviewed by Cybernews staff.
Microsoft's outage drags Claude AI down as thousands report problems
While Microsoft is still struggling to get its Office applications back on track, the impact is spreading to major AI companies.
Thousands of users reported problems accessing Claude on Friday as Microsoft's global outage entered its second day. The disruption affected Claude's website, coding assistant Claude Code, and Anthropic's developer platform.
Anthropic acknowledged the problems on its status page, reporting “elevated errors on claude.ai, Claude Code, and platform.claude.com.”
Reportedly, the company said it was investigating authentication problems affecting users trying to access Claude.ai and Claude Code.
Downdetector recorded around 3,800 reports of problems with Claude at approximately 10:15 GMT on Friday. The number subsequently dropped to around 270 reports by 10:30 GMT, suggesting that the disruption may have eased, although user reports alone do not confirm a full recovery.
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The Claude disruption follows Microsoft's widespread Microsoft 365 outage, which has affected a long list of services, including Outlook, Teams, SharePoint, and other business applications.
Anthropic had already identified problems with its Microsoft 365 connector on Thursday evening, which it linked to the ongoing Microsoft service incident.
“Requests to mail, SharePoint, Teams chat and calendar through the connector may fail, and new connections to the connector may not complete,” Anthropic said in an earlier status update.
Anthropic is not the only AI company reporting problems connected to Microsoft's infrastructure.
OpenAI previously reported issues with its Microsoft connectors, warning that new connections could fail and some tools might not work as expected.
Microsoft has attributed its outage to elevated infrastructure load and has said it has found no indication of malicious or cyber activity.
