# Maincode: matilda-jev

> Maincode's one-pass decision model: a 26.1B checkpoint whose 255-option readout scores the options of choice, noul (yes/no) and ordered score questions over text, JSON or image state, with a stored calibration temperature and no text-generation head.

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

## Facts

| | |
|---|---|
| Maker | Maincode (https://systemonemodels.ai/maincode) |
| Decides | choice, score, noul |
| Architecture | matilda-jev |
| Parameters | 26B |
| Context | 256K tokens |
| Licence | apache-2.0 |
| Availability | Open weights |
| Released | 2026-09-30 |
| Latest version | 1.3.0 |

## Model card

<!-- generated by scripts/seed_catalog.py; edit content/models/catalog.yaml -->

# MATILDA-jev v1

Maincode's one-pass decision model: a 26.1B checkpoint whose 255-option readout scores the options of choice, noul (yes/no) and ordered score questions over text, JSON or image state, with a stored calibration temperature and no text-generation head.

The card does not name a base model; the modeling code subclasses Transformers' Qwen3.5 classes and the LICENSE carries Alibaba Cloud's Apache-2.0 notice. The weights were replaced with "v1.3" on 2 October; the card's validation (25 of 25 smoke questions, exact probability parity with the earlier checkpoint, on an AMD MI355X) dates from 30 September and predates that swap. Maincode quotes a Decision Index 0.2.1 score of 59.59 (raw 69.18, breadth 58.39) from its own run over 150,317 requests, awaiting official submission; the Decision Index is a third-party board, and the model was not on its public board as of 6 October. No accuracy, calibration-error or latency figures are given. BF16 weights need about 49 GiB; load with trust_remote_code or the bundled maincode_jev_serve runtime (POST /v1/systemone); only AMD MI355X has been tested. A leftover line on the card still mentions the repository being private; it is public and ungated.

## 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 | 26.1B |
| Maker | Maincode |
| Released | 2026-09-30 |
| License | apache-2.0 |

## Get the weights

```bash
pip install systemonemodels
systemone pull maincode/matilda-jev
```

The files are served from the maker's Hugging Face repository, [`Maincode/matilda-jev-v1`](https://huggingface.co/Maincode/matilda-jev-v1), and verified against the checksums recorded here.

## Read more

- [Model card](https://huggingface.co/Maincode/matilda-jev-v1)
- [Maincode](https://maincode.com)

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

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