If that's referring to Large Language Models, meaning everything after the fist GPT and BERT, then that's absolutely not right. The first LLM that demonstrated the ability to generate coherent, fluently grammatical English was GPT-2. That story about the unicorns- that was the first time a statistical language model was able to generate text that stayed on the subject over a long distance and made (some) sense.
GPT-2 was followed by GPT 3 and GPT 3.5 that turned the hype dial up to 11 and were certainly "public" at least if that means publicly available. They were coherent enough that many people predicted all sorts of fancy things, like the end of programming jobs and the end of journalist jobs and so on.
So, weird statement that one and it kind of makes me wary of Gell-Mann amnesia while reading the article.