A 0.4B decision model made from the first 20 layers of Qwen3-0.6B plus a small attention head that compares options. It answers choice, noul and score questions in one pass, and choice order cannot change its answer by construction. Non-commercial licence.
A family of open System One models by Mark Marosi that softmax option-letter logits at an answer slot: decider-0.8b, 2b, 4b and 35b-a3b on Qwen3.5 bases, decider-12b on Gemma-4-12B-it, and training-free readouts of larger chat models. This page carries decider-2b v11.
Decides
choice, score, noul
choice, score, noul, classify, route
Architecture
bev-decider
decider
Fine-tuned from
qwen/qwen3-0.6b
qwen/qwen3.5-2b-base
License
cc-by-nc-4.0
apache-2.0
Availability
Open weights
Open weights
Hosted by
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Input price
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Decision accuracy
74.7%
75.2%
Calibration error
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Valid action rate
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Median latency
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p95 latency
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Figures are from each model’s manifest; accuracy and latency are what the publishers report, on their own suites and hardware. Add a third model.
Questions
What is the difference between bev-decider and decider?
bev-decider is from Avishek Biswas and decider from Mapika. Both have open weights you can download and run. Both answer choice, score and noul questions. Only decider answers classify and route. decider reads up to 32K tokens of state, against 2K tokens for bev-decider. bev-decider is the smaller model, at 478M parameters to 1.9B. bev-decider is licensed cc-by-nc-4.0; decider, apache-2.0.
Which is more accurate, bev-decider or decider?
They report on different suites — bev-decider 74.7% on avbiswas/bev-decision test split (5,000 held-out questions over 2,617 states), the maker's own, decider 75.2% on Decider regression set, 28 held-out tasks (decider-2b v11) — so the numbers do not rank them. Test both on your own labelled examples.
Which is cheaper, bev-decider or decider?
bev-decider: Free (open weights). decider: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run bev-decider or decider locally?
Yes, both: systemone pull avishek-biswas/bev-decider and systemone pull mapika/decider download the weights.
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Evaluation suite
avbiswas/bev-decision test split (5,000 held-out questions over 2,617 states), the maker's own
