I think it's very pragmatic on the writing of applications; the issue for using it to undertake reviews is you would have to give highly confidential information (i.e. the grant application itself) to OpenAI/other. How can any funder sanction that?

I understand why they’re doing it, but I don’t like the asymmetry, especially as we (the reviewers) are then having to read AI-generated text, with associated waste of our time (which we are not compensated for).