"Best" depends heavily on what you're optimizing for, so here's what actually matters for beginners over 40, rather than just declaring a winner.
You want an assistant that holds context across a real conversation, so you're not starting from scratch every time you ask a follow-up — useful when you're working through something like planning a trip or untangling a confusing form over several messages. You want one that reads naturally rather than robotically, since a stiff, jargon-heavy response is exactly the kind of thing that makes people quietly close the tab and not come back. And you want one that doesn't require learning special commands or symbols to get good results.
Claude, which I teach, checks those boxes in my own experience — plain conversational tone, strong memory within a conversation, no special syntax required. That's a real, considered preference, not a claim that every alternative fails these tests.
Whatever you land on, the actual skill — plain requests, real situations, comfort asking again — transfers to any of them.
On Ramp AI teaches that skill using Claude specifically. Here's a look at it.