Claude Outage Analysis: How a Network Misconfiguration Disrupted Opus 4.5 and Sonnet

Claude Service Disruption: A Comprehensive Analysis of the Opus 4.5 and Sonnet Outage Snippet On December 14, 2025, from 13:25 to 14:43 PT, Claude’s Opus 4.5 and Sonnet models experienced degraded availability due to a network routing misconfiguration that dropped backend traffic. The issue was resolved by reverting the configuration, fully restoring service to the API, claude.ai, and Claude Code. Introduction: When AI Services Stumble In the intricate world of artificial intelligence, where massive models process billions of parameters, the underlying infrastructure is just as critical as the algorithms themselves. Even the most advanced systems are vulnerable to human error, …