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onepass: caliber-flex-5b and Contrastive-LM: clm, compared on what they decide, where they run, what they cost and what their publishers report.
| Property | onepass/caliber-flex-5b | contrastive-lm/clm |
|---|---|---|
| Summary | Caliber Flex 5B by OnePass. Decision-only model, exactly 5,000,000,000 parameters. | Contrastive Language Models score a state against a set of candidate actions with a contrastive objective. Two projection heads on frozen Qwen3-8B embeddings, trained with InfoNCE; clm-serve maps Choice, Score and Noul onto candidate ranking. |
| Decides | choice, noul, score | choice, score, noul, rank, classify, route |
| Architecture | llm | clm |
| Fine-tuned from | qwen/qwen3.5-4b-base | qwen/qwen3-8b |
| License | caliber-flex-non-commercial-1.0 | apache-2.0 |
| Availability | Open weights | Open weights |
| Hosted by | — | — |
| Input price | — | — |
| Decision accuracy | — | — |
| Calibration error | — | — |
| Valid action rate | — | — |
| Median latency | — | — |
| p95 latency | — | — |
| Evaluation suite | — | — |
| Latest version | 0.2.0 | 2026.09.25 |
| Variants | Modelfile, merged, LICENSE | LICENSE |
| Size of latest version | 13.3 GB | 72.1 MB |
| Files | 17 | 3 |
| Downloads | 69 | 28 |
| Stars | 1 | 0 |
| Tags | decision-model, calibrated, qwen3_5, timesfm-distilled, onepass, gguf | system-one, contrastive, qwen, ranking, 8b |
| Updated | Oct 29, 2026 | Oct 28, 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 clm from Contrastive-LM. Both have open weights you can download and run. Both answer choice, noul and score questions. Only clm answers rank, classify and route. caliber-flex-5b is licensed other; clm, apache-2.0.
Neither publishes an accuracy figure. Test both on your own labelled examples.
caliber-flex-5b: Free (open weights). clm: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Yes, both: systemone pull onepass/caliber-flex-5b and systemone pull contrastive-lm/clm download the weights.