On March 17, 2026, Claude AI experienced an outage that affected thousands of users globally. The issues began in the morning UK time, with more than 10,000 users reporting problems, particularly with Claude Chat and coding tools.
During the peak of the outage, Downdetector recorded over 6,800 complaints per hour, indicating a widespread disruption. Users primarily faced API Error 500, which rendered many functionalities unusable, especially for free users of Claude AI.
Reports indicated that the outage was not a complete shutdown but resulted in elevated errors, particularly affecting Claude’s Opus and Sonnet systems. Initial reports suggested around 5,000 users were experiencing problems, which later decreased to about 1,000 ongoing reports as the situation progressed.
In response to the outage, Claude AI’s status checker indicated that a fix was being implemented. A representative stated, “A fix has been implemented and we are monitoring the results.” Meanwhile, another update mentioned, “We are currently investigating this issue. We have identified mitigations which we are continuing to regularly employ as we investigate the root cause.”
Users expressed frustration over the situation, with one user, Jenesh Napit, commenting, “Claude Code is down, basically a snow day.” The outage led to a standstill in work for many, with numerous references to API Error 500 highlighting the severity of the issue.
This outage underscores the dependency of users on AI tools for coding, research, and productivity. As the situation develops, users are left waiting for a full recovery of services.
Details remain unconfirmed regarding the exact cause of the outage, leaving many users anxious about future reliability. The ongoing situation continues to affect users across the US, UK, and Asia, emphasizing the global impact of the disruption.
