LLMs are very capable of performing a lot of feats that seem incredible to us, but they are bound by the borders of what Generative AI was originally meant to do: generate text based on the data it has been trained on.
They cannot access any services on the web to give us more accurate and recent answers, and instead, they are meant to answer using the training data that their creators were able to gather many years ago. They cannot access tools as simple as a calculator that would help to give mathematical answers instead of having to memorize the result of every mathematical operation. They are reliant on us to perform the actions they suggest to do in the real world, and we report back to them with the results.