Ultra-small English encoders (17M, 68M and 395M) fine-tuned from Ettin rerankers. Each answers choice, noul and score questions with a probability per candidate and no generated text. Experimental v0 by one developer; the weights have no licence assigned yet.
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
bekko
laya
Fine-tuned from
cross-encoder/ettin-reranker-400m-v1
answerdotai/modernbert-large
License
Unassigned: the weights licence is not finalised (treated as non-commercial); training code 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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Calibration error
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Valid action rate
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Median latency
5 ms
39.5 ms
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 bekko-system-one and laya?
bekko-system-one is from Yuichi Tateno (hotchpotch) 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. bekko-system-one is the smaller model, at 395M parameters to 421M. bekko-system-one is licensed other; laya, apache-2.0.
Which is more accurate, bekko-system-one or laya?
Neither publishes an accuracy figure. Test both on your own labelled examples.
Which is cheaper, bekko-system-one or laya?
bekko-system-one: Free (open weights). laya: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Which is faster, bekko-system-one or laya?
By their publishers’ figures, bekko-system-one answers in about 5 ms at the median and laya in about 39.5 ms — measured on different hardware, so treat it as a rough guide.
Can I run bekko-system-one or laya locally?
Yes, both: systemone pull hotchpotch/bekko-system-one and systemone pull convai-innovations/laya download the weights.
p95 latency
5.4 ms
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Evaluation suite
The maker's short-input speed probe (4-option Choice, RTX 5090, 1 Oct 2026)
