jev is optimized for it, a standard LLM isn't and it also costlier and slower.
But both LLMs and Jev-like models would need to prefill, the only optimization Jev does differently is the decode which can be emulated by reading off logprobs.
We don’t know the param size of Jev, to determine the most comparable model, but if I had to guess it’s sub-100B.