T. Spark

Even when there are only limited relevant literature or information available online, it's still doing much better than you could expect. I asked both CleeAI and Perplexity AI the same questions, and CleeAI is a clear winner in every response. Most of the times you won't even need a follow-up question (they don't have this function anyway by the time). It's the best free AI tool I've come across so far. It has already become my most visited webpage and my best companion in intellectual pursuit.