On the early morning of November 9th, OpenAI issued a fix announcement, explaining the global downtime of ChatGPT and its API. The outage lasted for two hours and has been repaired, though it remains unstable. External speculation suggests a connection with the GPT-4 Turbo model. History shows that OpenAI typically addresses incidents promptly, but this recent consecutive downtime, particularly severe, may lead to future optimizations. A detailed account of the incident and historical downtime is attached, along with mention of an upcoming preview release of the GPT-4 Turbo model.