Comment by LordDragonfang

That quote almost perfectly describes o1, which was the first major model to explicitly build in compute time as a part of its scaling. (And despite claims of vagueness, I can't think of a single model release it describes better). The idea of a scratchpad was obvious, but no major chatbot had integrated it until then, because they were all focused on parameter scaling. o1 was released at the very end of 2024.