Where do you draw the line? GPT2 was introduced as a LLM, and you can easily run it on more limited devices than a recent iPhone. Did it stop being an LLM when bigger models were released? Is llama 7B an LLM or an "SLM"?
Relatively speaking. It's like the definition of a supercomputer 30 years ago is a cheap Android phone in your pocket today.
You can certainly run a transformer model or any other neural network based model on an iPhone. Siri is probably some kind of neural network. But obviously a model running on device is nowhere near comparable to the current state of the art LLM's. Can't fit a $40k GPU in your pocket (yet).
A transformer running on an iPhone would be roughly 2 orders of magnitude smaller than the state of the art LLM (GPT4 with a trillion parameters)
