Caliber Flex 5B by OnePass. Decision-only model, exactly 5,000,000,000 parameters.
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, noul, score
choice, score, noul, classify, route
Architecture
llm
decider
Fine-tuned from
qwen/qwen3.5-4b-base
qwen/qwen3.5-2b-base
License
caliber-flex-non-commercial-1.0
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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Evaluation suite
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 caliber-flex-5b and decider?
caliber-flex-5b is from onepass and decider from Mapika. Both have open weights you can download and run. Both answer choice, noul and score questions. Only decider answers classify and route. caliber-flex-5b is licensed other; decider, apache-2.0.
Which is more accurate, caliber-flex-5b or decider?
Only decider publishes an accuracy figure (75.2% on Decider regression set, 28 held-out tasks (decider-2b v11)); caliber-flex-5b does not, so there is no comparison to make without your own test.
Which is cheaper, caliber-flex-5b or decider?
caliber-flex-5b: Free (open weights). decider: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run caliber-flex-5b or decider locally?
Yes, both: systemone pull onepass/caliber-flex-5b and systemone pull mapika/decider download the weights.
