On May 24, 2023, OpenAI reported a 51-minute outage of ChatGPT (chat.openai.com), causing workers all over the world to grudgingly consider doing their jobs unassisted during that time. OpenAI has a status page showing, for each calendar day, the number of hours that OpenAI's services were unavailable.
For chat.openai.com (the web interface, ChatGPT), the uptime has been published since Feburary, with Feburary at 98.28%, March at 99.39%, April at 99.96%, and 99.83% for May as of May 24, 2023.
Software reliability is often measured in "number of 9"s, i.e. 90%, 99%, 99.9%, 99.99%, etc. To reach 99.9% uptime, a service must be down for no more than 43 minutes in a 30-day month.
ChatGPT reportedly was the software product that grew to 100 million users the fastest of any software product ever, and may struggle to handle the load. However, it would be reasonable to expect it to get more stable over time, and before the outage on May 24, was on track for May to reach 99.9%. What will happen in June?