Von 1.2
A ModernBERT-large encoder with an option-marker head. Premise and options are packed into one sequence and each option's marker is scored in a single bidirectional pass; version 1.2 makes the scoring order-invariant.
On JevBench's public standard tier Von scores 63.9% (easy 100%, hard 36.9%) with a calibration error of 0.045, though the calibration map was fitted on the same 231 items. Context is 8,192 tokens, and von-sdk (pip and npm) serves /v1/systemone. Latency is about 18 ms on a GPU.
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 | 395M |
| Base model | answerdotai/modernbert-large |
| Maker | wfzyx |
| Released | 2026-09-19 |
| License | apache-2.0 |
| Reported accuracy | 63.9% |
| Reported latency | ~18 ms on a GPU |
Get the weights
pip install systemonemodels
systemone pull wfzyx/von
The files are served from the maker's Hugging Face repository, wfzyx/von, and verified against the checksums recorded here.
Read more
This page was opened by System One for wfzyx, who can claim the organisation and take it over at any time.