The flagship of the vLLM Semantic Router team's Decision 1.0 family. Qwen3.5-9B with a shared candidate head returns a probability for every supplied answer to choice, yes/no and score questions, over a 16,384-token input.
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.
Figures are from each model’s manifest; accuracy and latency are what the publishers report, on their own suites and hardware. Add a third model.
Questions
What is the difference between decision and von?
decision is from vLLM Semantic Router and von from wfzyx. Both have open weights you can download and run. Both answer choice, score, noul and classify questions. Only decision answers route. decision reads up to 16K tokens of state, against 8K tokens for von. von is the smaller model, at 395M parameters to 9.0B.
Which is more accurate, decision or von?
They report on different suites — decision 77.4% on vLLM-SR decision benchmark (54 tasks, 3,766 decisions, weighted), von 63.9% on JevBench public standard tier — so the numbers do not rank them. Test both on your own labelled examples.
Which is cheaper, decision or von?
decision: Free (open weights). von: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run decision or von locally?
Yes, both: systemone pull vllm-semantic-router/decision and systemone pull wfzyx/von download the weights.
