A 0.6B decision model on Qwen3-0.6B-Base from the DocsGPT team. Give it a state and typed questions (yes/no, a choice of up to 16 options, a 3- or 4-level score) and it returns calibrated probabilities in one pass, for RAG and agent checks.
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, classify, rank, route
choice, score, noul, classify, route
Architecture
arc-decide
decider
Fine-tuned from
qwen/qwen3-0.6b-base
qwen/qwen3.5-2b-base
License
mit
apache-2.0
Availability
Open weights
Open weights
Hosted by
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Input price
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Decision accuracy
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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 arc-decide and decider?
arc-decide is from Arc53 and decider from Mapika. Both have open weights you can download and run. Both answer choice, score, noul, classify and route questions. Only arc-decide answers rank. arc-decide is the smaller model, at 600M parameters to 1.9B. arc-decide is licensed mit; decider, apache-2.0.
Which is more accurate, arc-decide or decider?
Only decider publishes an accuracy figure (75.2% on Decider regression set, 28 held-out tasks (decider-2b v11)); arc-decide does not, so there is no comparison to make without your own test.
Which is cheaper, arc-decide or decider?
arc-decide: Free (open weights). decider: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run arc-decide or decider locally?
Yes, both: systemone pull arc53/arc-decide and systemone pull mapika/decider download the weights.
