vLLM-SR Decision 2.0 Nox 4B
vLLM-SR Decision 2.0 Nox 4B by vLLM Semantic Router is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 45.0 on the Jev Decision Index (rank 65).
Pricing
No hosted price is listed. The weights are open: the cost is your own compute.
Specifications
- Provider
- vLLM Semantic Router
- Parameters
- 4B
- Released
- Sep 2026
- Open weights
- Yes
- Question types
- Choice (one of N options), Score (ordered rubric), Yes / no
- Mechanism
- Decoder LM with a decision readout
- Backbone
- Qwen/Qwen3.5-4B-Base
- Jev-compatible request
- Yes
- Runs on CPU
- No
- License
- apache-2.0
- Hugging Face
- vllm-sr/Decision-2.0-Nox-4B
Benchmarks
- Jev Decision IndexECE 0.030
- 45.0
Jev Decision Index: public 44.2, ECE 0.030, Brier 0.436. Lower ECE means its probabilities can be taken at face value.
Self-reported by the publisher
The model's own claims, often on its own sets or a self-run copy of a public suite. Not independently verified and never ranked alongside measured results.
- Jev Decision Index public suite (self-run)Self-reportedDecision Index public balanced skill, edition 0.2.1 kit (release-v2.1), self-run
- 43.8
Speed & latency
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FAQ
How much does vLLM-SR Decision 2.0 Nox 4B cost?
vLLM-SR Decision 2.0 Nox 4B has no hosted price listed; its weights are open, so the cost is the compute you run it on.
What questions can vLLM-SR Decision 2.0 Nox 4B answer?
vLLM-SR Decision 2.0 Nox 4B answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is vLLM-SR Decision 2.0 Nox 4B well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.030; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is vLLM-SR Decision 2.0 Nox 4B open weight, and can it run on a CPU?
Yes, vLLM-SR Decision 2.0 Nox 4B has open weights. It needs a GPU to run at useful speed.
Data as of 2026-10-14. Source: Metatext decision-model catalogue, 2026-10-14 (Jev Decision Index, Hugging Face). Pricing is per 1M tokens (USD); confirm with the provider before production use.