It's interesting. Recently I came up with a question that I posted to different LLMs with different results. It's about the ratio between GDP (PPP adjusted) to general GDP. ChatGPT was good, but because it found a dedicated web page exactly with this data and comparison so just rephrased the answer. General perplexity.ai when asked hallucinated significantly showing Luxemburg as the leader and pointing to some random gdp-related resources. But this kind of perplexity gave a very good "research" on a prompt "I would like to research countries about the ratio between GDP adjusted to purchasing power and the universal GDP. Please, show the top ones and look for other regularities". Took about 3 minutes