Cloudflare clef-flash vs Nace.AI Drex v1.5
Nace.AI Drex v1.5 is more accurate on the Jev Decision Index, Cloudflare clef-flash is better calibrated. Choose on whichever of accuracy, calibration and cost matters most for your decisions.
| Spec | Cloudflare clef-flash | Nace.AI Drex v1.5 |
|---|---|---|
| Provider | Cloudflare | Nace.AI |
| Decision Index score | 47.6 | 49.7 |
| Calibration error (ECE) | 0.025 | 0.090 |
| Median latency (p50) | 53 ms | 54 ms |
| Cost per 1,000 decisions | — | $0.010 |
| Parameters | 10B | 9B |
| 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 | nace-ai-open-rail-m |
FAQ
Is Cloudflare clef-flash or Nace.AI Drex v1.5 more accurate?
Nace.AI Drex v1.5 scores higher on the Jev Decision Index (49.7 vs 47.6).
Which is better calibrated, Cloudflare clef-flash or Nace.AI Drex v1.5?
Cloudflare clef-flash has the lower expected calibration error (0.025 vs 0.090), so its stated confidence is closer to how often it is right.
Is Cloudflare clef-flash or Nace.AI Drex v1.5 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.