# SimpleJev: jevany

> SimpleJev's LoRA adapters and pointer head that turn an open model into a typed-decision model: given a state, a question and the options, it returns a probability for every option without generating text. This entry is the Qwen3.8-27B release; the others are linked.

- Page: https://systemonemodels.ai/simplejev/jevany
- API: https://api.systemonemodels.ai/v1/models/simplejev/jevany
- Download: `pip install systemonemodels && systemone pull simplejev/jevany`

## Facts

| | |
|---|---|
| Maker | SimpleJev (https://systemonemodels.ai/simplejev) |
| Decides | choice, score, noul |
| Architecture | jevany |
| Base model | qwen/qwen3.8-27b |
| Parameters | 27B |
| Licence | apache-2.0 |
| Availability | Open weights |
| Released | 2026-09-29 |
| Latest version | 2026.09 |

## Reported evaluation

Suite: SimpleJev Transfer suite (1,046 decisions from seven cross-domain datasets plus robustness slices; the maker's own). Numbers are the publisher's own.

- Decision accuracy: 86.0%
- Calibration error (ECE): 0.026

## Model card

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# JevAny Qwen3.8-27B LoRA

SimpleJev's LoRA adapters and pointer head that turn an open model into a typed-decision model: given a state, a question and the options, it returns a probability for every option without generating text. This entry is the Qwen3.8-27B release; the others are linked.

Adapter only (rank 8 plus a pointer head); users need Qwen3.8-27B themselves. The pointer readout takes very many options; the direct-token variant is capped at 255. Trained on 2.18M labelled decisions, building on Kev's code (Apache-2.0). Calibration figures are after temperature scaling on a separate partition. On SimpleJev's own cross-domain Transfer suite the 27B scores 86.04% (ECE 0.026); its own run on JevBench's 231 public items gives 90.04%, not a leaderboard result. Siblings on Qwen3.5-4B (pointer and direct-token), Gemma 4B and Muse-Glimmer-30B. Not related to Featherless AI's simple-jev server, nor to Jev or TypeSafe.

## What it decides

- **choice** — picks one option from a set
- **score** — places the input on an ordered scale
- **noul** — answers a yes/no question with one probability

## At a glance

| | |
|---|---|
| Parameters | 27B |
| Base model | `Qwen/Qwen3.8-27B` |
| Maker | SimpleJev |
| Released | 2026-09-29 |
| License | apache-2.0 |
| Reported accuracy | 86.0% |

## Get the weights

```bash
pip install systemonemodels
systemone pull simplejev/jevany
```

The files are served from the maker's Hugging Face repository, [`SimpleJev/JevAny-Qwen3.8-27B-LoRA`](https://huggingface.co/SimpleJev/JevAny-Qwen3.8-27B-LoRA), and verified against the checksums recorded here.

## Read more

- [Model card](https://huggingface.co/SimpleJev/JevAny-Qwen3.8-27B-LoRA)
- [JevAny Qwen3.5-4B LoRA](https://huggingface.co/SimpleJev/JevAny-Qwen3.5-4B-LoRA)
- [Code](https://github.com/SimpleJev/JevAny)
- [Site](https://simplejev.org)

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*This page was opened by System One for SimpleJev, who can claim the organisation and take it over at any time.*

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From System One Models — https://systemonemodels.ai/ · every System One model: https://systemonemodels.ai/system-one-models