You can try "language model", that's what I use when talking (when writing I use LLM when I expect the abbreviation to be understood).

I find just juxtaposing these two normal words flows much more nicely from the tongue than the comparatively awkward "LLM".

Or "gen(erative) AI". I must admit that as soon as I saw AI in the title, I lost interest until I realized it was classic AI. The term seems so far gone now but we don't have a good classifier for the non-gen-ai yet.

We probably should call LLMs "Alchemy" at least until the big AI companies remove the disclaimer that "AI can make mistakes".

I call it "mechanised coding".