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.
TokenRhythm's prefill-only decision model for agent workflows. Built on its NeoHorse-1-4B (a Qwen3.5-4B derivative), it predicts Choice, Noul and Score answers over application-defined options without generating text, with optional single-image input.
Decides
choice, noul, score
choice, score, noul, classify, route
Architecture
bekko
neohorse
Fine-tuned from
cross-encoder/ettin-reranker-400m-v1
tokenrhythm/neohorse-1-4b
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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75.3%
Calibration error
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Valid action rate
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Median latency
5 ms
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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 bekko-system-one and neohorse-jev?
bekko-system-one is from Yuichi Tateno (hotchpotch) and neohorse-jev from TokenRhythm. Both have open weights you can download and run. Both answer choice, noul and score questions. Only neohorse-jev answers classify and route. bekko-system-one is the smaller model, at 395M parameters to 4.0B. bekko-system-one is licensed other; neohorse-jev, apache-2.0.
Which is more accurate, bekko-system-one or neohorse-jev?
Only neohorse-jev publishes an accuracy figure (75.3% on JevBench public set (231 items), vLLM, maker's run); bekko-system-one does not, so there is no comparison to make without your own test.
Which is cheaper, bekko-system-one or neohorse-jev?
bekko-system-one: Free (open weights). neohorse-jev: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run bekko-system-one or neohorse-jev locally?
Yes, both: systemone pull hotchpotch/bekko-system-one and systemone pull tokenrhythm/neohorse-jev 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)
JevBench public set (231 items), vLLM, maker's run
