# Claude AI down globally, thousands of users report authentication error 2026-08-17T05:37:42+00:00 | Technology | Indian Opinion Desk Corroboration: 1 independent outlet Anthropic's Claude AI suffered a widespread outage on Sunday evening, with thousands of users across the United States reporting an 'authentication service unavailable' error when trying to access the chatbot. Downdetector recorded over 15,000 error reports by 6:15 p.m. EDT. Anthropic's status page initially confirmed an investigation into the issue affecting claude.ai, platform.claude.com, the Claude API, Claude Code, and Claude Cowork. A later update said a fix had been deployed and was being monitored. The company's status page later confirmed the issue had been resolved, but Anthropic has not disclosed the cause of the outage. Users took to social media to report the disruption, with one in Silicon Valley noting the outage had lasted at least 15 minutes. Another remarked that the timing on a Sunday evening meant fewer workday disruptions. Downdetector showed the highest concentration of reports in major US tech hubs. ## Coverage - hindustantimes.com This story was synthesised by AI from the source linked above. Tags: Anthropic, Claude, Downdetector, United States Canonical: https://indianopinion.org/claude-ai-down-globally-thousands-of-users-report-authentication-error/ License: Summary and commentary (c) Indian Opinion, reusable with attribution. Facts belong to the linked sources. Cite: https://indianopinion.org/claude-ai-down-globally-thousands-of-users-report-authentication-error/#story-in-brief Review state: restored archive article, accurate at time of publication, not offered to search indexes. How this brief was made: an AI model read the report linked above and wrote this summary and analysis, which were published automatically. Published briefs are sampled every hour by an automated quality check; the editor verifies its findings and approves corrections, and corrected briefs carry a dated correction line. We do no original reporting. Methodology: https://indianopinion.org/ai-use-policy/