Project profile

Von

A 395M ModernBERT decision model with Python and TypeScript clients and a /v1/systemone server.

Decision ModelOpen SourcePythonApache-2.0Active

Last verified: 2026-09-30

Quick facts

Project	Von
Creator	wfzyx
Type	Decision Model
Language	Python
License	Apache-2.0
Uses Jev for	Local /v1/systemone server
Open source	Yes
Status	Active

What it is

Von answers Choice, Noul, and Score over text or JSON without generating tokens. The README says it is a 395M ModernBERT encoder, served on CPU with OpenVINO as well as CUDA, ROCm, and Apple MPS, and that von serve speaks the TypeSafe wire protocol.

Why it matters

It is a small encoder with its own SDK and an explicit English-only limit, which is the sort of constraint a migration note has to keep.

Relationship to Jev

Hosted Jev	Not called.
Wire shape	README: von serve exposes /v1/systemone. The repository description calls it a local drop-in.
Clients	von-sdk on PyPI and npm. The README also shows decide, judge, rate, and system_one helpers.
Language	README: English only. Other languages get token matching whose confidence it says the model has not earned.

Architecture

Text or JSON state
395M encoder
One forward pass
/v1/systemone response

Key features

Several questions over one state are one forward pass, according to the README.
Weights are fetched from Hugging Face on first use. The README says that download is about 3 GB.
The README's curl example names the model von-1.3.0.

Performance and claims

Project claim

The GitHub repository description says Von is a sub-15 ms, non-autoregressive, local drop-in alternative to TypeSafe Jev.

Independent verification

Jev AI Hub read the README opening and the repository record on 2026-09-30. It has not timed a decision or compared answers with hosted Jev.

Jev AI Hub analysis

The useful documented constraints are the 395M encoder, the English-only note, and the wire path. The latency line is a repository-description claim until someone measures it on their own machine.

Limitations

The README says judge without criteria is the weakest path.
English only.
The repository description says sub-15 ms. The README opening reviewed here states the model size and the CPU path, not that latency figure.

Code and repository

https://github.com/wfzyx/von

GitHub snapshot captured 2026-09-30: 779 stars, 57 forks, 2 open issues. Last push 2026-09-30. Counts change; this is not a live lookup.

Related Jev concepts

Choice Score

Related guides

Open-source System One models

Related projects

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Sources

Von READMEwfzyx · accessed 2026-09-30 · github
wfzyx/von repository metadataGitHub · accessed 2026-09-30 · third-party

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