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.
Uprelic's hosted decision API, run on GPUs in Paris. Answers noul, choice and score questions about text, JSON and up to 8 images, with a probability for every option and no generated text, on the same request shape as Jev. No weights; base model and size not disclosed.
Decides
choice, noul, score
choice, score, noul, classify, route
Architecture
bekko
strom
Fine-tuned from
cross-encoder/ettin-reranker-400m-v1
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License
Unassigned: the weights licence is not finalised (treated as non-commercial); training code MIT
proprietary
Availability
Open weights
Hosted API
Hosted by
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Uprelic
Input price
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$0.042/MTok
Decision accuracy
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87.0%
Calibration error
—
0.033
Valid action rate
—
—
Median latency
5 ms
136 ms
p95 latency
5.4 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 strom?
bekko-system-one is from Yuichi Tateno (hotchpotch) and strom from Uprelic. bekko-system-one has open weights you can download and run; strom is only available as a hosted API. Both answer choice, noul and score questions. Only strom answers classify and route. bekko-system-one is licensed other; strom, proprietary.
Which is more accurate, bekko-system-one or strom?
Only strom publishes an accuracy figure (87.0% on JevBench public set (231 items), the maker's production run of Strom 1.0.7 on 1 Oct 2026 (Open-Jev harness format)); bekko-system-one does not, so there is no comparison to make without your own test.
Which is cheaper, bekko-system-one or strom?
bekko-system-one: Free (open weights). strom: $0.042 / $0 per 1M. Open weights cost nothing per call beyond your own hardware.
Which is faster, bekko-system-one or strom?
By their publishers’ figures, bekko-system-one answers in about 5 ms at the median and strom in about 136 ms — measured on different hardware, so treat it as a rough guide.
Can I run bekko-system-one or strom locally?
bekko-system-one yes — systemone pull hotchpotch/bekko-system-one downloads its weights. The other is only served as a hosted API.
Evaluation suite
The maker's short-input speed probe (4-option Choice, RTX 5090, 1 Oct 2026)
JevBench public set (231 items), the maker's production run of Strom 1.0.7 on 1 Oct 2026 (Open-Jev harness format)
