ChatGPT, Sora, and OpenAI's API faced a significant outage on Thursday, starting around 11 a.m. PT, lasting over an hour. OpenAI attributed the disruption to issues with an upstream provider but did not provide further details. This incident marks the second outage for these services this December, with a prior disruption lasting approximately six hours due to a new telemetry service. Although the outage affected ChatGPT and Sora, popular services using OpenAI's API, such as Perplexity and Siri, remained operational. OpenAI is currently working to resolve the issue.