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HEAD TO HEAD
onepass: caliber-flex-1b and FrontiersMind: lumma-fev, compared on what they decide, where they run, what they cost and what their publishers report.
| Property | onepass/caliber-flex-1b | frontiersmind/lumma-fev |
|---|---|---|
| Summary | Caliber Flex 1B by OnePass. Decision-only model, exactly 1,000,000,000 parameters. | FrontiersMind's decision model on a base it pre-trained from scratch. Each question reads the state and its own tokens once and a 256-dimension pointer head scores the options; Choice and Score take up to 255 entries, and nothing is generated. |
| Decides | choice, noul, score | choice, score, noul |
| Architecture | llm | lumma-fev |
| Fine-tuned from | qwen/qwen3.5-0.8b-base | frontiersmind/lumma-0.6b-base |
| License | caliber-flex-non-commercial-1.0 | apache-2.0 |
| Availability | Open weights | Open weights |
| Hosted by | — | — |
| Input price | — | — |
| Decision accuracy | — | 64.0% |
| Calibration error | — | — |
| Valid action rate | — | — |
| Median latency | — | 45.8 ms |
| p95 latency | — | — |
| Evaluation suite | — | typed-decisions (maker's table; split not stated) |
| Latest version | 0.3.0 | 2026.09 |
| Variants | LICENSE, Modelfile, merged | LICENSE, NOTICE |
| Size of latest version | 2.6 GB | 1.2 GB |
| Files | 12 | 12 |
| Downloads | 68 | 1 |
| Stars | 0 | 0 |
| Tags | decision-model, calibrated, qwen3_5, timesfm-distilled, onepass, gguf | system-one, pointer-head, multilingual, indic, 649m |
| 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-1b is from onepass and lumma-fev from FrontiersMind. Both have open weights you can download and run. Both answer choice, noul and score questions. caliber-flex-1b is licensed other; lumma-fev, apache-2.0.
Only lumma-fev publishes an accuracy figure (64.0% on typed-decisions (maker's table; split not stated)); caliber-flex-1b does not, so there is no comparison to make without your own test.
caliber-flex-1b: Free (open weights). lumma-fev: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Yes, both: systemone pull onepass/caliber-flex-1b and systemone pull frontiersmind/lumma-fev download the weights.