On the ninth day of its holiday-themed stretch of product announcements known as "12 Days of OpenAI," OpenAI is rolling out its most advanced model, o1, to third-party developers through its ...

Shortly after Hunter Lightman joined OpenAI as a researcher in 2022, he watched his colleagues launch ChatGPT, one of the fastest-growing products ever. Meanwhile, Lightman quietly worked on a team ...

OpenAI has sent out emails notifying API customers that its chatgpt-4o-latest model will be retired from the developer platform in mid-February 2026,. Access to the model is scheduled to end on ...