Nace.AI Drex v2.0 (35B-A3B)
Nace.AI Drex v2.0 (35B-A3B) by Nace.AI is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 55.9 on the Jev Decision Index (rank 29). Hosted, it costs about $0.012 per 1,000 decisions.
Pricing
Cost per 1,000 decisions assumes 200 input tokens per decision.
Specifications
- Provider
- Nace.AI
- Parameters
- 35B
- 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
- Qwen/Qwen3.6-35B-A3B
- Jev-compatible request
- Yes
- Runs on CPU
- No
- License
- nace-ai-open-rail-m
- Hugging Face
- nace-ai/drex-v2.0
Benchmarks
- Jev Decision IndexECE 0.018
- 55.9
Jev Decision Index: public 61.3, ECE 0.018, Brier 0.317. 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 0.3 kit (release-v3), self-run
- 61.3
Speed & latency
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FAQ
How much does Nace.AI Drex v2.0 (35B-A3B) cost?
Hosted, Nace.AI Drex v2.0 (35B-A3B) costs $0.06 per 1M input tokens, about $0.012 per 1,000 decisions at 200 input tokens each.
What questions can Nace.AI Drex v2.0 (35B-A3B) answer?
Nace.AI Drex v2.0 (35B-A3B) answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is Nace.AI Drex v2.0 (35B-A3B) well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.018; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is Nace.AI Drex v2.0 (35B-A3B) open weight, and can it run on a CPU?
Yes, Nace.AI Drex v2.0 (35B-A3B) 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 (OpenRouter, Jev Decision Index, Hugging Face). Pricing is per 1M tokens (USD); confirm with the provider before production use.