The first step in that direction will be the release of GPT-4.5, known internally as "Orion."
Expected to be coming within the following weeks and months as confirmed by Altman—it will be OpenAI's last model built upon the traditional GPT technology, which is basically the ChatGPT we all know and love.
The real transformation will come with GPT-5, which is supposed to incorporate all of OpenAI's technologies, including the capabilities of the unreleased o3 model.