Caliber Flex 5B by OnePass. Decision-only model, exactly 5,000,000,000 parameters.
An open-weights System One model from Convai Innovations. A fully fine-tuned ModernBERT-large encoder with a from-scratch decision head that scores one marker per option and answers every question in a single 33–39 ms pass. Runs on your own CPU or GPU.
Decides
choice, noul, score
choice, score, noul, classify, route
Architecture
llm
laya
Fine-tuned from
qwen/qwen3.5-4b-base
answerdotai/modernbert-large
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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Calibration error
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Valid action rate
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Median latency
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39.5 ms
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 laya?
caliber-flex-5b is from onepass and laya from Convai Innovations. Both have open weights you can download and run. Both answer choice, noul and score questions. Only laya answers classify and route. caliber-flex-5b is licensed other; laya, apache-2.0.
Which is more accurate, caliber-flex-5b or laya?
Neither publishes an accuracy figure. Test both on your own labelled examples.
Which is cheaper, caliber-flex-5b or laya?
caliber-flex-5b: Free (open weights). laya: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run caliber-flex-5b or laya locally?
Yes, both: systemone pull onepass/caliber-flex-5b and systemone pull convai-innovations/laya download the weights.
