Skip to content

Jev Report

An independent Chinese-language report auditing where Jev's headline numbers come from, plus a reproducible 50-sample Chinese evaluation: 86 of 90 judgments right, ECE 0.070, run for a fraction of a cent.

Stars
1
Language
Python
License
MIT
Published by
Community
Author
HackSing
Last verified
Oct 2026

Highlights

  • Independent tests put the speedup at 5-25x and the cost advantage at 1.6x at the conservative end, not the vendor's headline multiples.
  • It separates zero type errors from zero mistakes: in one independent test Jev missed 1 of 7 issues.
  • Its own 50-sample Chinese run scores 86/90 with ECE 0.070, and a 0.80 gate auto-passes 66 judgments while routing all 3 errors to a human.
  • Every figure carries a source tier and a verified flag, set true only when the author read the number in the raw material.

Watch out

Everything is in Chinese except the data files. The 50-sample evaluation uses gold labels written by a single annotator over material the author composed, so it supports a claim about those 50 samples and nothing beyond them, and the confidence-gate result rests on 70 judgments. Latency figures were measured from a Manila exit IP and the README says they do not represent a direct connection from mainland China. Whether this is a new architecture or a fine-tuned encoder behind a new name is left explicitly unresolved, because none of the three pieces of evidence that would separate the two hypotheses exist yet. The author is unaffiliated with TypeSafe and self-funded the run. Copy reviewed against the repository README on 2026-10-04, not from running it.

Questions about this entry

Short answers drawn from the linked project or page.

More Jev resources like this

24GitHub stars
Unofficial laptop study of parallel constrained decoding: prefill once, share the KV cache across fields, and decide all schema fields in one batched forward pass without writing JSON.
Jev Practices & Patterns#community#jevbest#catalog-import
22GitHub stars
Offline evaluator that checks whether classifier confidences match reality and converts mistake costs into a deployable threshold, emitting an HTML report plus machine-readable threshold files.
Jev Practices & Patterns#community#jevbest#catalog-import
16GitHub stars
Vendor-neutral harness that tests whether Jev reranking improves a small RAG stack, using frozen hybrid BM25 plus BGE-M3 candidates and isolating retrieval, rerank, and generation stages.
Jev Practices & Patterns#community#jevbest#catalog-import
37GitHub stars
Minimal Python recipe that turns any causal LLM into a Jev-style classifier by prefilling choice_index and constraining sampling to legal indexes in one forward pass.
Jev Practices & Patterns#community#jevbest#catalog-import
39GitHub stars
Open replica of the typed decision API on openly available base models, answering choice, score, and true-probability questions in one forward pass with no decoding.
Jev Practices & Patterns#community#jevbest#catalog-import
34GitHub stars
Curated catalog of community Jev applications grouped by use, where each case explains the mechanism and states what the public evidence does and does not prove.
Jev Practices & Patterns#community#jevbest#catalog-import

From the Jev guides

Original write-ups on what this entry is for.

Most Jev accuracy problems are state problems. What belongs in a state, what is a pre-made judgment to leave out, and why naming the slice you ask about matters more than the wording.
Jev Practices & Patterns#state#design#primitives
Read article
A Noul returns one number and no separate confidence. How to read the value, pin its boundary with criteria, split compound questions, and set a per-action threshold that matches the cost of being wrong.
Jev Practices & Patterns#noul#primitives#confidence
Read article
A Score is a weighted position, not a ruler. Why the number can land between levels, why levels are judged separately, and how to combine several atomic scores in code instead of one crowded rubric.
Jev Practices & Patterns#score#primitives#scoring
Read article
Back to all resources

From the Jev community

Posts from builders shipping with Jev right now.

Follow @typesafeai