Zev
Zev by bhubbard is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 0.0 on the Jev Decision Index (rank 160).
Pricing
No hosted price is listed. The weights are open: the cost is your own compute.
Specifications
- Provider
- bhubbard
- Parameters
- —
- Released
- Oct 2026
- Open weights
- Yes
- Question types
- Choice (one of N options), Score (ordered rubric), Yes / no
- Mechanism
- Decoder LM with a decision readout
- Backbone
- —
- Jev-compatible request
- No
- Runs on CPU
- —
- License
- —
Benchmarks
- Jev Decision IndexECE 0.138
- 0.0
Jev Decision Index: public 1.6, ECE 0.138, Brier 0.776. 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
- 4.8
Speed & latency
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FAQ
How much does Zev cost?
Zev has no hosted price listed; its weights are open, so the cost is the compute you run it on.
What questions can Zev answer?
Zev answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is Zev well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.138; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is Zev open weight, and can it run on a CPU?
Yes, Zev has open weights.
Data as of 2026-10-14. Source: Metatext decision-model catalogue, 2026-10-14 (Jev Decision Index). Pricing is per 1M tokens (USD); confirm with the provider before production use.