# Featherless AI: simple-jev

> Featherless AI's open server that turns a stock Hugging Face language model into a typed-decision endpoint. It reads the next-token logits for each question and builds the Choice, Score or Noul answer itself; no classifier head is trained and no JSON is generated.

- Page: https://systemonemodels.tech/featherless-ai/simple-jev
- API: https://api.systemonemodels.tech/v1/models/featherless-ai/simple-jev
- Download: `pip install systemonemodels && systemone pull featherless-ai/simple-jev`

## Facts

| | |
|---|---|
| Maker | Featherless AI (https://systemonemodels.tech/featherless-ai) |
| Decides | choice, score, noul, classify, route |
| Architecture | simple-jev |
| Base model | google/gemma-4-26b-a4b-it |
| Licence | apache-2.0 |
| Availability | Open weights + hosted API |
| Released | 2026-09-18 |
| Latest version | 2026.09 |

## Hosted API

- Provider: Featherless AI (https://simple-jev.featherless.ai)

- Input: — · Output: —

## Model card

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# SimpleJev

Featherless AI's open server that turns a stock Hugging Face language model into a typed-decision endpoint. It reads the next-token logits for each question and builds the Choice, Score or Noul answer itself; no classifier head is trained and no JSON is generated.

There are no SimpleJev weights: the server runs models such as Gemma-4-26B-A4B (the public demo), Qwen3.8-27B or Qwen3.5-0.8B, plus a native backend for Laya. Up to 255 options per Choice, up to 256 questions per request, and a configurable context. A free demo API (2k tokens, 2 requests per second) needs no key; higher limits are on Featherless's paid plans. Featherless publishes no accuracy of its own and says it does not reproduce Jev's training. Third-party results: JevBench v1.4.2 ranks the Qwen3.8-27B demo 34th (86.6% public, 35.7% sealed); Decision Index 0.2.1 scores it 55.74. Server code Apache-2.0; the served model's own licence applies.

## 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 calibrated probability
- **classify** — assigns a category from a fixed taxonomy
- **route** — sends the input to one of several destinations

## At a glance

| | |
|---|---|
| Base model | `google/gemma-4-26b-a4b-it` |
| Maker | Featherless AI |
| Released | 2026-09-18 |
| License | apache-2.0 |

## Hosted API

Served by **Featherless AI**. [Get access](https://simple-jev.featherless.ai).

## Read more

- [Code](https://github.com/featherless-ai/simple-jev)
- [Demos and docs](https://simple-jev.featherless.ai)
- [JevBench v1.4.2](https://github.com/fstandhartinger/jevbench/blob/main/docs/RELEASE-v1.4.2.md)

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

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