jevos-v4

Decisions on a laptop CPU in 28–130 ms. Send a text and a question (yes/no, multiple choice or a score) and get back the probability of each answer, in TypeSafe Jev's API, on your own machine. Free and open source: an alternative to Jev that runs locally.

Same Snake game, same questions for both: jevos-v4 on a laptop answers in about 20 ms, Jev's cloud API in about 350 ms (mostly the network round trip), so the local snake makes many more moves in the same time.

Files

These are the same files as the jevos-v4 release on GitHub; the SHA-256 of each is in that release's SHA256SUMS.txt.

Quickstart

Get the jev binary for your system from the GitHub release (Windows, Linux, macOS on Apple silicon), then put the model next to it:

tar -xzf jev-linux-x64.tar.gz                 # Windows: unzip jev-windows-x64.zip
hf download feder-cr/jev --include "model/*" --local-dir jev
cd jev
./jev serve                                   # Windows: jev.exe serve

curl http://127.0.0.1:8017/v1/systemone -H 'Content-Type: application/json' -d '{
  "model": "jev-latest",
  "state": "I was charged twice for the same order.",
  "questions": {"billing": {"type": "noul", "instructions": "Is this a billing problem?"}}}'

{"model": "jevos-v4", "answers": {"billing": {"type": "noul", "noul": 0.94}}, "usage": {"input_tokens": 27, "output_tokens": 0}}

One binary, CPU only, no Python.

Benchmarks

Same questions for every system, through the same HTTP client. Latency is the median of 10 requests on an Intel Core Ultra 7 255H laptop, 16 threads, each text read from scratch. No task text was used to train jevos; five of the six sets helped choose the released checkpoint.

jevos-v4 is much faster than the cloud API and free, but less accurate than Jev on the harder tasks above (fraud points, patent phrases): check it on your own questions before relying on it.

API

POST /v1/systemone, in TypeSafe Jev's wire format: code written for Jev's SDK works unchanged for yes/no questions. One request can ask several questions about the same text, which is read once:

{
  "model": "jev-latest",
  "state": {"item": "wireless mouse", "customer_message": "The box arrived empty. This is the second time!"},
  "questions": {
    "refund": {"type": "noul", "instructions": "Our policy refunds items reported missing within 30 days of delivery. Should this customer get a refund?"},
    "team": {"type": "choice", "instructions": "Which team should handle this message?",
             "criteria": {"billing": "payments, refunds", "shipping": "deliveries, missing parcels", "tech": "a product that does not work"}},
    "anger": {"type": "score", "instructions": "How angry is the customer?", "criteria": ["calm", "annoyed", "angry", "furious"]}
  }
}

A noul returns P(yes); a choice the most probable option; a score the expected level. Choices and scores also return a probability per answer and a confidence: when it is low, send the case to a person. Put the rule in the question, and do sums in code.

Options, memory use and building from source are in the README on GitHub; guides and measurements are in the wiki.

License and authors

MIT. Built by Federico Elia (@feder-cr) together with Loris Salsi (@LosaLosSantos).