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.
SimpleJev's LoRA adapters and pointer head that turn an open model into a typed-decision model: given a state, a question and the options, it returns a probability for every option without generating text. This entry is the Qwen3.8-27B release; the others are linked.
Decides
choice, noul, score
choice, score, noul
Architecture
bekko
jevany
Fine-tuned from
cross-encoder/ettin-reranker-400m-v1
qwen/qwen3.8-27b
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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86.0%
Calibration error
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0.026
Valid action rate
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Median latency
5 ms
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p95 latency
5.4 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 jevany?
bekko-system-one is from Yuichi Tateno (hotchpotch) and jevany from SimpleJev. Both have open weights you can download and run. Both answer choice, noul and score questions. bekko-system-one is the smaller model, at 395M parameters to 27B. bekko-system-one is licensed other; jevany, apache-2.0.
Which is more accurate, bekko-system-one or jevany?
Only jevany publishes an accuracy figure (86.0% on SimpleJev Transfer suite (1,046 decisions from seven cross-domain datasets plus robustness slices; the maker's own)); bekko-system-one does not, so there is no comparison to make without your own test.
Which is cheaper, bekko-system-one or jevany?
bekko-system-one: Free (open weights). jevany: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run bekko-system-one or jevany locally?
Yes, both: systemone pull hotchpotch/bekko-system-one and systemone pull simplejev/jevany download the weights.
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Evaluation suite
The maker's short-input speed probe (4-option Choice, RTX 5090, 1 Oct 2026)
SimpleJev Transfer suite (1,046 decisions from seven cross-domain datasets plus robustness slices; the maker's own)
