The Deep Research mode is on rails, but they're much more generous with it than anyone else. You run out of Claude usage almost instantly if you use theirs. ChatGPT gives you a decent number but then locks you out for a month after that.
Perplexity is still the king there in terms of the balance between price and quality. It doesn't do as many searches as ChatGPT's deep research, but you get virtually unlimited usage.
