Which Ai model would you recommend for academic research?

For academic purpose, like understanding a pathway or some mechanisms, I often depend on Ai. For small queries Assist (formerly Duckassist) is enough. But for complex and big queries I go for these Ai tools. But I'm confused. I mean which Ai will be best for the above purpose?

And as these are not updated to the present time, in spite of this limitation, which one will be best for research/study, including modern scientific findings (as latest as possible)?

For academic purpose, like understanding a pathway or some mechanisms, I often depend on Ai. For small queries Assist (formerly Duckassist) is enough. But for complex and big queries I go for these Ai tools. But I'm confused. I mean which Ai will be best for the above purpose?

And as these are not updated to the present time, in spite of this limitation, which one will be best for research/study, including modern scientific findings (as latest as possible)?