Consumer laptops, such as apple silicon macbooks with just 32gb ram, can run fairly large models, such as Mixtral-8x7b, an open source model that's comparable to gpt-3.5, well enough for interactive chat, (and seems likely models of this size will keep improving) - ofc, 64gb ram preferable, because it unlocks larger models. And 3090s are the other way to to go, which are faster but not quite as much vram, though you can use multiple.