Jev is, as far as I understand, essentially very optimised for zero shot classification [0]. Something like BERT could be and has been tuned to provide similar "decision making" at a similar latency and cost advantage quite some time back. Advantage over full on LLMs is mainly the efficiency and of something like Jev over e.g. the encoder/decoder based classifier I had in front of an LLM to route to different prompts depending on the users likely needs, that Jev does perform at a more consistent level, allegedly roughly akin to GPT-5.6 Terra, but at the lower cost and latency. Currently testing that, but seems promising, if Jev classifies at or above Terra level, I see no reason not to leverage it.
Can add that I tried using a heavily pruned mt0 based model for structured classification along with structured output for local tagging and simple renaming suggestions. While it does work, the balance is hard to get right for the machine I was targeting as a minimum spec (Macbook Neo), so that's on ice. Focusing on one of the tasks easily goes below 100mb with solid latency across all EU Latin script languages, but the second you add a few, it's simply not in the quality budget, so while LLMs can do anything Jev and similarly focused models can, it comes at a literal cost. Could maybe accomplish the goal with multiple models (BERT+mt0+...), but that get messy.
In general just happy to see a bit of the millions flooding into the industry being used to improve on less flashy but immensely useful solutions. It's amazing that you can technically use LLMs for most tasks, but not every org has a near infinite budget and there is still a lot to gain from applying more recent learnings to old solutions along with just updating their training data to the current year. Also makes business sense, competition on frontier or mid-tier LLMs is vicious, focusing on an underserved niche with clear application is clever.