System One scorer (Qwen3.5-4B)
One of the earliest Jev-shaped scorers. A sequence-classification head on Qwen3.5-4B-Base scores each (state, question, option) triple and softmaxes per question. Non-commercial licence.
A rank-16 LoRA and a scalar head (30.5M trainable parameters) on the frozen base; the repository holds the adapter only. Reported 70.7% with a calibration error of 0.044; 112 ms per question with 4 options, 560 ms with 77. The CC-BY-NC-4.0 licence is inherited from the ticket data it was trained on, so it cannot be used commercially and is not mirrored here.
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
At a glance
| Parameters | 4B |
| Base model | qwen/qwen3.5-4b-base |
| Maker | pngwn |
| Released | 2026-09-16 |
| License | cc-by-nc-4.0 |
| Reported accuracy | 70.7% |
| Reported latency | 112 ms per question at 4 options; 560 ms at 77 |
Get the weights
pip install systemonemodels
systemone pull pngwn/system-one-qwen3-5-4b-scorer
The files are served from the maker's Hugging Face repository, pngwn/system-one-qwen3.5-4b-scorer, and verified against the checksums recorded here.
Read more
This page was opened by System One for pngwn, who can claim the organisation and take it over at any time.