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It's a modeling of language, it's not structurally anything like an LLM.

It’s literally a trigram (character) language model. Check any NLP book from before 2015 or so.

LLMs have more stuff bolted onto them (embeddings, RLHF) but the autoregressive core is a direct descendent of that sort of language model.

So, LM vs LLM? :)

It is structurally exactly the same thing as an LLM...