open-jev (pngwn)
open-jev (pngwn) by pngwn is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 32.1 on the Jev Decision Index (rank 103).
Pricing
No hosted price is listed. The weights are open: the cost is your own compute.
Specifications
- Provider
- pngwn
- Parameters
- 5B
- 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
- No
- Runs on CPU
- No
- License
- cc-by-nc-4.0
- Hugging Face
- pngwn/system-one-qwen3.5-4b-scorer-v2b
Benchmarks
- Jev Decision IndexECE 0.059
- 32.1
Jev Decision Index: public 30.5, ECE 0.059, Brier 0.545. Lower ECE means its probabilities can be taken at face value.
Speed & latency
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FAQ
How much does open-jev (pngwn) cost?
open-jev (pngwn) has no hosted price listed; its weights are open, so the cost is the compute you run it on.
What questions can open-jev (pngwn) answer?
open-jev (pngwn) answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is open-jev (pngwn) well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.059; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is open-jev (pngwn) open weight, and can it run on a CPU?
Yes, open-jev (pngwn) 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, Enterprise Decision Arena, Hugging Face). Pricing is per 1M tokens (USD); confirm with the provider before production use.