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2 models, side by side.
What each one decides, how well calibrated it is, how fast it answers and what it costs to pull. Up to 4 at a time; the better value in each row is marked.
| Property | mapika/decider | bespoke-labs/bespoke-nimble-9b |
|---|---|---|
| Summary | The most-downloaded open System One reproduction. Merged Qwen3.5 fine-tunes, trained on about 95 public decision sets, then calibration-aware RL and a rank-64 LoRA, that softmax letter logits at an answer slot. | An open Jev-style LoRA on Qwen3.5-9B from Bespoke Labs, trained on 2,676 contrastively curated examples to score the allowed answer tokens directly for enums, booleans and rubric levels. Recipe, data and a public benchmark suite are released with it. |
| Decides | choice, score, noul, classify, route | choice, noul, score, classify, route |
| Architecture | decider | nimble |
| Fine-tuned from | qwen/qwen3.5-2b-base | qwen/qwen3.5-9b |
| License | apache-2.0 | apache-2.0 |
| Availability | Open weights | Open weights + hosted API |
| Hosted by | — | Bespoke Labs |
| Input price | — | — |
| Decision accuracy | 80.2% | 90.1% |
| Calibration error | 0.038 | 0.054 |
| Valid action rate | — | — |
| Median latency | 3.2 ms | 106 ms |
| p95 latency | — | — |
| Evaluation suite | Decider 67-task regression set | Bespoke held-out set (324 examples) |
| Latest version | 2026.09 | 2026.09 |
| Variants | — | SHA256SUMS |
| Size of latest version | 3.5 GB | 184.3 MB |
| Files | 4 | 10 |
| Downloads | 0 | 0 |
| Stars | 0 | 0 |
| Tags | system-one, qwen, rl, calibrated, 2b | system-one, qwen, lora, curated-data, 9b |
| Updated | Sep 25, 2026 | Sep 25, 2026 |