Claude.ai Hit by Major Login Outage

Anthropic’s Claude.ai is experiencing a major outage, leaving users unable to log in to the popular AI chatbot.

The company confirmed the disruption on its official status page, logging elevated errors across multiple platforms .

The incident was first reported at 09:58 UTC on Friday, with Anthropic stating it was investigating authentication issues .

Beyond the main chatbot, the outage is affecting Claude Code, platform.claude.com, and Claude Cowork .

The Claude API, however, remains operational, suggesting the disruption is primarily tied to user access and session verification .

Users have reported being unable to sign in, load the application, or receive responses from the servers .

The exact root cause has not been disclosed, and Anthropic has not provided an estimated restoration time .

This outage coincides with a separate, ongoing Microsoft 365 disruption that has also impacted Claude’s connector for Outlook and other Microsoft services .

Anthropic has not linked the two incidents, but its status page notes the Microsoft 365 connector remains degraded .

Affected users are advised to monitor the official Claude status page for further updates as the investigation continues.