ResearchResearch paperLarge Language Models1 source · Oct 21, 2026

Our Own Jev: Typed Decisions in One Forward Pass, from an In-House Judge to Open LoRA Models

A typed decision maps evidence, a question and a fixed set of options to a probability for every option, computed in one forward pass, by reading a language model's logits or a small head over its hidden states, instead of generating and parsing text.

Key points

  • The commercial system Jev popularised this System 1 interface, and open reproductions have followed.
  • We report two uses of the pattern.
  • Part II asks whether a readout that adds no parameters can be competitive and whether training one helps.
  • Applying the public Eikos recipe and corpus of about 25K decisions to three further backbones (1B, 2B and 35B), we read the frozen output layer of a LoRA-adapted decoder.

Sources (1)

  • [1]Our Own Jev: Typed Decisions in One Forward Pass, from an In-House Judge to Open LoRA Models
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 21, 01:28 AM
    A typed decision maps evidence, a question and a fixed set of options to a probability for every option, computed in one forward pass, by reading a language model's logits or a small head over its hidden states, instead of generating and parsing text.
    The commercial system Jev popularised this System 1 interface, and open reproductions have followed.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 20, 2026Gradium Open-Sources Phonon, a 31M-Parameter On-Device TTS Model Under Apache 2.0
  2. Oct 20, 2026Voxtral 3
  3. Oct 20, 2026[AINews] DeepSeek DeepInfer: Open Source SOTA Inference running 155T toks/day/cluster making $22m/day at ~80% margin for a 81 day payback
  4. Oct 20, 2026Do Diffusion LLMs Scale? Testing Mercury 3 + Decide
  5. Oct 20, 2026MPS in PyTorch 2.15
  6. Oct 19, 2026Introducing Clairic, a new System One class of extraction models

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