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HEAD TO HEAD
Jared Palmer: kev and Maziyar Panahi: modernjev-decide, compared on what they decide, where they run, what they cost and what their publishers report.
| Property | jared-palmer/kev | maziyar-panahi/modernjev-decide |
|---|---|---|
| Summary | 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. | A 149.6M ModernBERT-base cross-encoder with a scalar head that picks an agent's next action or tool from labels and descriptions you supply. Each option is scored against the state and a softmax ranks the set; no text is generated. Experimental preview, not calibrated. |
| Decides | choice, score, noul, classify, route | choice, rank, route |
| Architecture | kev | modernjev |
| Fine-tuned from | qwen/qwen3.5-4b-base | answerdotai/modernbert-base |
| License | apache-2.0 | apache-2.0 |
| Availability | Open weights | Open weights |
| Hosted by | — | — |
| Input price | — | — |
| Decision accuracy | 83.8% | 73.4% |
| Calibration error | 0.042 | — |
| Valid action rate | — | — |
| Median latency | — | — |
| p95 latency | — | — |
| Evaluation suite | transfer-v4 (locked, out of domain) | AgentToolDecisions-180K held-out test, next action type (1,158 decisions, 3 choices; the maker's split) |
| Latest version | 2026.09 | 2026.09 |
| Variants | — | — |
| Size of latest version | 152.2 MB | 574.1 MB |
| Files | 11 | 5 |
| Downloads | 1 | 0 |
| Stars | 0 | 0 |
| Tags | system-one, qwen, lora, pointer-head, 4b | system-one, encoder, modernbert, cross-encoder, tool-routing, preview, 149.6m |
| Updated | Oct 7, 2026 | Oct 7, 2026 |
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.
kev is from Jared Palmer and modernjev-decide from Maziyar Panahi. Both have open weights you can download and run. Both answer choice and route questions. Only kev answers score, noul and classify. Only modernjev-decide answers rank. kev reads up to 8K tokens of state, against 4K tokens for modernjev-decide. modernjev-decide is the smaller model, at 150M parameters to 4.0B.
They report on different suites — kev 83.8% on transfer-v4 (locked, out of domain), modernjev-decide 73.4% on AgentToolDecisions-180K held-out test, next action type (1,158 decisions, 3 choices; the maker's split) — so the numbers do not rank them. Test both on your own labelled examples.
kev: Free (open weights). modernjev-decide: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Yes, both: systemone pull jared-palmer/kev and systemone pull maziyar-panahi/modernjev-decide download the weights.