Sieve 2B
Sieve 2B by Sthānika AI is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 20.5 on the Jev Decision Index (rank 123).
Pricing
No hosted price is listed. The weights are open: the cost is your own compute.
Specifications
- Provider
- Sthānika AI
- Parameters
- 2B
- 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/Qwen3.5-2B-Base
- Jev-compatible request
- No
- Runs on CPU
- No
- License
- apache-2.0
- Hugging Face
- sthanika-ai/Sieve-2B
Benchmarks
- Jev Decision IndexECE 0.088
- 20.5
Jev Decision Index: public 22.2, ECE 0.088, Brier 0.578. 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
- 21.7
- Decision Index 0.3.2 leaderboard (public suite and the maintSelf-reported
- 22.2
- held-out pool (clinc, newsgroups, yahoo, LEDGAR)Self-reported
- 0.777
- MASSIVE, held out (1,200 questions)Self-reported
- 0.715
- MMLU, held out (1,500 questions)Self-reported
- 0.608
- transfer-v4 clean (328 questions, never trained on)Self-reported
- 0.732
Speed & latency
Compare Sieve 2B with…
FAQ
How much does Sieve 2B cost?
Sieve 2B has no hosted price listed; its weights are open, so the cost is the compute you run it on.
What questions can Sieve 2B answer?
Sieve 2B answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is Sieve 2B well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.088; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is Sieve 2B open weight, and can it run on a CPU?
Yes, Sieve 2B 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.