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HEAD TO HEAD
onepass: caliber-flex-5b and Jared Palmer: kev, compared on what they decide, where they run, what they cost and what their publishers report.
| Property | onepass/caliber-flex-5b | jared-palmer/kev |
|---|---|---|
| Summary | Caliber Flex 5B by OnePass. Decision-only model, exactly 5,000,000,000 parameters. | 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. |
| Decides | choice, noul, score | choice, score, noul, classify, route |
| Architecture | llm | kev |
| Fine-tuned from | qwen/qwen3.5-4b-base | qwen/qwen3.5-4b-base |
| License | caliber-flex-non-commercial-1.0 | apache-2.0 |
| Availability | Open weights | Open weights |
| Hosted by | — | — |
| Input price | — | — |
| Decision accuracy | — | 83.8% |
| Calibration error | — | 0.042 |
| Valid action rate | — | — |
| Median latency | — | — |
| p95 latency | — | — |
| Evaluation suite | — | transfer-v4 (locked, out of domain) |
| Latest version | 0.2.0 | 2026.09 |
| Variants | Modelfile, merged, LICENSE | — |
| Size of latest version | 13.3 GB | 152.2 MB |
| Files | 17 | 11 |
| Downloads | 69 | 1 |
| Stars | 1 | 0 |
| Tags | decision-model, calibrated, qwen3_5, timesfm-distilled, onepass, gguf | system-one, qwen, lora, pointer-head, 4b |
| Updated | Oct 29, 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.
caliber-flex-5b is from onepass and kev from Jared Palmer. Both have open weights you can download and run. Both answer choice, noul and score questions. Only kev answers classify and route. caliber-flex-5b is licensed other; kev, apache-2.0.
Only kev publishes an accuracy figure (83.8% on transfer-v4 (locked, out of domain)); caliber-flex-5b does not, so there is no comparison to make without your own test.
caliber-flex-5b: Free (open weights). kev: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Yes, both: systemone pull onepass/caliber-flex-5b and systemone pull jared-palmer/kev download the weights.