Claude AI, Code, Console, and Cowork Are Down and Not Working In Latest Outage, Anthropic Confirms

Following nationwide Microsoft outage that has knocked down Outlook and Exchange Online, Anthropic’s Claude AI services are now facing a major outage. The AI company has acknowledged authentication problems affecting Claude.ai and Claude Code. Its status page currently lists multiple services affected with major and partial outage.

Authentication problems hit Claude’s web app and coding tools

According to Anthropic’s status, it is investigating problems affecting users trying to authenticate with Claude.ai and Claude Code. It has not provided a confirmed cause or recovery timeline yet. At the time of writing, Downdetector recorded a huge spike with over thousands of user reports related to Claude issues.

The degradation of Claude services extends beyond the main chatbot. Anthropic lists Claude Console, Claude Code, and Claude Cowork among the affected services. Interestingly, the Claude API remains operational, hinting that the issue isn’t necessarily affecting every way developers access Anthropic’s models.

Anthropic investigates as users face sign-in trouble

Not to forget, Anthropic reported Microsoft 365 connector problems on November 12. That earlier incident affected mail, calendar, and search tools connected through Microsoft 365. The company attributed those problems to an upstream Microsoft service incident.

That being said, Anthropic has not linked today’s authentication issues to the Microsoft outage. Users trying to access Claude may encounter sign-in failures or trouble restoring existing sessions. Claude Code users could also face authentication problems when attempting to connect.

Anthropic says it will provide another update as soon as more information becomes available. We’ll update the article accordingly.

This is a developing story…