Cloudflare clef vs Sieve 4B
Cloudflare clef is more accurate on the Jev Decision Index, Sieve 4B is better calibrated. Choose on whichever of accuracy, calibration and cost matters most for your decisions.
| Spec | Cloudflare clef | Sieve 4B |
|---|---|---|
| Provider | Cloudflare | Sthānika AI |
| Decision Index score | 53.1 | 46.1 |
| Calibration error (ECE) | 0.040 | 0.031 |
| Median latency (p50) | 102 ms | 93 ms |
| Cost per 1,000 decisions | — | — |
| Parameters | 28B | 5B |
| Open weights | Yes | Yes |
| Question types | Choice (one of N options), Score (ordered rubric), Yes / no | Choice (one of N options), Score (ordered rubric), Yes / no |
| Mechanism | Decoder LM with a decision readout | Decoder LM with a decision readout |
| License | apache-2.0 | apache-2.0 |
FAQ
Is Cloudflare clef or Sieve 4B more accurate?
Cloudflare clef scores higher on the Jev Decision Index (53.1 vs 46.1).
Which is better calibrated, Cloudflare clef or Sieve 4B?
Sieve 4B has the lower expected calibration error (0.031 vs 0.040), so its stated confidence is closer to how often it is right.
Is Cloudflare clef or Sieve 4B cheaper per 1,000 decisions?
A hosted price is not recorded for both models; open-weight models cost the compute you run them on.
Cost per 1,000 decisions assumes 200 input tokens per decision. Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.