Thousands of OpenAI's ChatGPT users are experiencing service disruptions, with a significant spike in outage reports noted by Downdetector.com. Despite user complaints, OpenAI has not officially acknowledged the issue. Reports include "Bad gateway" error messages and problems with photo uploads, particularly noted around 12:30 PM CET on Thursday. As of now, over 5,600 reports have come from the UK and over 4,300 from the US.