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

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".