We still do take-homes. You just design them assuming people are going to use LLMs. They're going to do that on the job anyways, so why tie a hand behind their back?
LLMs have also allowed us to significantly expand the scope of what we ask candidates to look at. Previously, we were constrained by time budgets (the candidate's, not ours) to a relatively small project, from which we had to read tea leaves; minor variations, objective but still small-bore, were determinative of how candidates ranked. Now we can drop a pretty ambitious project, which creates a lot of variation and room to demonstrate approach.