An open family of System One models. A LoRA adapter plus a pointer head on a frozen Qwen base returns a distribution per typed question in one forward pass, serves TypeSafe's /v1/systemone contract, and ships a fitted temperature with every checkpoint.
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, score, noul, classify, route
choice, score, noul, classify, route
Architecture
kev
strom
Fine-tuned from
qwen/qwen3.5-4b-base
—
License
apache-2.0
proprietary
Availability
Open weights
Hosted API
Hosted by
—
Uprelic
Input price
—
$0.042/MTok
Decision accuracy
83.8%
87.0%
Calibration error
0.042
0.033
Valid action rate
—
—
Median latency
—
136 ms
p95 latency
—
—
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 kev and strom?
kev is from Jared Palmer and strom from Uprelic. kev has open weights you can download and run; strom is only available as a hosted API. Both answer choice, score, noul, classify and route questions. strom reads up to 32K tokens of state, against 8K tokens for kev. kev is licensed apache-2.0; strom, proprietary.
Which is more accurate, kev or strom?
They report on different suites — kev 83.8% on transfer-v4 (locked, out of domain), strom 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) — so the numbers do not rank them. Test both on your own labelled examples.
Which is cheaper, kev or strom?
kev: Free (open weights). strom: $0.042 / $0 per 1M. Open weights cost nothing per call beyond your own hardware.
Can I run kev or strom locally?
kev yes — systemone pull jared-palmer/kev downloads its weights. The other is only served as a hosted API.
transfer-v4 (locked, out of domain)
JevBench public set (231 items), the maker's production run of Strom 1.0.7 on 1 Oct 2026 (Open-Jev harness format)
