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HEAD TO HEAD
Andy Zhang: ajev and SimpleJev: jevany, compared on what they decide, where they run, what they cost and what their publishers report.
| Property | andy-zhang/ajev | simplejev/jevany |
|---|---|---|
| Summary | An open Jev-style decision model by Andy Zhang: a LoRA adapter on Gemma 4 26B-A4B (also on Gemma 4 12B) that reads a state and returns a temperature-calibrated probability for every option of a yes/no, choice or score question in one forward pass. | 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, score, noul | choice, score, noul |
| Architecture | ajev | jevany |
| Fine-tuned from | google/gemma-4-26b-a4b-it | qwen/qwen3.8-27b |
| License | apache-2.0 | apache-2.0 |
| Availability | Open weights | Open weights |
| Hosted by | — | — |
| Input price | — | — |
| Decision accuracy | — | 86.0% |
| Calibration error | — | 0.026 |
| Valid action rate | — | — |
| Median latency | 49 ms | — |
| p95 latency | — | — |
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.
ajev is from Andy Zhang and jevany from SimpleJev. Both have open weights you can download and run. Both answer choice, score and noul questions. ajev is the smaller model, at 26B parameters to 27B.
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)); ajev does not, so there is no comparison to make without your own test.
ajev: Free (open weights). jevany: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Yes, both: systemone pull andy-zhang/ajev and systemone pull simplejev/jevany download the weights.
| Evaluation suite |
|---|
| Sequential requests, the maker's own measurement |
| SimpleJev Transfer suite (1,046 decisions from seven cross-domain datasets plus robustness slices; the maker's own) |
| Latest version | 2026.09 | 2026.09 |
|---|
| Variants | — | LICENSE, NOTICE |
|---|
| Size of latest version | 141.9 MB | 252.1 MB |
|---|
| Files | 3 | 11 |
|---|
| Downloads | 0 | 0 |
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| Stars | 0 | 0 |
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| Tags | system-one, gemma, lora, calibrated, 26b | system-one, qwen, lora, pointer-head, 27b |
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| Updated | Oct 7, 2026 | Oct 7, 2026 |
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