Anthropic’s AI chatbot Claude faced service disruptions on Friday, November 13, with users reporting difficulties logging into the platform and accessing its coding tools. The outage affected users attempting to access Claude.ai and Claude Code, while parts of the company’s developer platform also experienced disruptions.
The issue was related to authentication failures, preventing some users from signing in and accessing their accounts. Anthropic acknowledged the disruption and said it was investigating elevated errors affecting its services.
According to the company’s status page, the issue was first reported at 9:58 UTC (3:28 PM IST). Claude.ai was marked as experiencing a major outage, while Claude Code and Claude Console, available through platform.claude.com, reported partial outages.
The disruption triggered a sharp rise in user complaints, with several users reporting problems accessing the AI chatbot and its associated tools.
Claude AI outage: Anthropic confirms issue resolved
Anthropic subsequently deployed a fix for the authentication issue and began monitoring the recovery of its services. The company later marked the login outage as resolved.
However, some services continued to experience degraded performance following the resolution of the authentication issue. Users may therefore still encounter occasional performance problems while accessing certain Claude features.
Microsoft 365 connector faces separate disruption
The login problems came amid a separate ongoing disruption affecting Anthropic’s Microsoft 365 connector.
The incident affected its mail, calendar and search tools, with several requests failing. Claude for Outlook was also impacted.
Anthropic clarified that the Microsoft 365 connector issue was linked to an upstream service disruption and was separate from the latest authentication problems. The company was working with Microsoft to address the issue.
Claude outage triggers user complaints
The outage also triggered a significant increase in reports on Downdetector, a platform that tracks service disruptions based on user complaints.
The disruption highlighted the growing dependence on AI platforms among users and developers who rely on these tools for coding, research and everyday tasks.