Jevstral 8B
Jevstral 8B by AmirBraham is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 35.9 on the Jev Decision Index (rank 96).
Pricing
No hosted price is listed. The weights are open: the cost is your own compute.
Specifications
- Provider
- AmirBraham
- Parameters
- 8B
- 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
- mistralai/Ministral-3-8B-Base-2512
- Jev-compatible request
- No
- Runs on CPU
- No
- License
- apache-2.0
- Hugging Face
- AmirBraham/jevstral-8b
Benchmarks
- Jev Decision IndexECE 0.047
- 35.9
Jev Decision Index: public 34.0, ECE 0.047, Brier 0.495. 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
- 34.3
Speed & latency
Compare Jevstral 8B with…
FAQ
How much does Jevstral 8B cost?
Jevstral 8B has no hosted price listed; its weights are open, so the cost is the compute you run it on.
What questions can Jevstral 8B answer?
Jevstral 8B answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is Jevstral 8B well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.047; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is Jevstral 8B open weight, and can it run on a CPU?
Yes, Jevstral 8B 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.