I've seen that claim made but I've not seen it in reality.

There are examples of where LLMs are useful for information retrieval in that they can take vague queries and produce good summaries, but they're just as likely to produce reasonable-sounding nonsense that needs to be carefully verified.

I've also seen examples where LLMs can produce code that implements well-defined toy problems but when used on a real software system with millions of lines of context they do not produce code that can remain coherent with the system.

From what I've seen LLMs have yet to graduate from "impressive demo" and everyone characterizing them as being a revolution are still describing some potential future state with no real evidence that we'll get there with this technology or any time soon.