Cloudflare released Clef weights, a Jev-compatible interface and Workers AI hosting.
Cloudflare opens Clef decision models for fast structured routing
2026-10-01Verified announcementTRIAL
Cloudflare released Clef and Clef-flash, Apache-2.0 decision models that return bounded typed outputs for routing and classification. They are Jev-API compatible, available as open weights and hosted on Workers AI. Clef adds image input and a 64k context window; author benchmarks report median latency of 209.3 ms for Clef and 38.8 ms for Clef-flash.
Official · AnnouncementIntroducing Clef decision modelsOfficial · WeightsCloudflare Clef model card and weights
Availability: Apache-2.0 weights and Workers AI hosting
What this means for you
For agent teams, a small deterministic decision model can move routine routing out of a general LLM's hot path. The public weights and API compatibility make a one-day latency, calibration and abstention comparison practical.
Evidence & related material
Technical details & scores
| Models | Clef and Clef-flash |
|---|---|
| Availability | Apache-2.0 weights and Workers AI hosting |
| Compatibility | Jev API |
| Context | 64k for Clef |
| Author Latency | median 209.3 ms Clef; 38.8 ms Clef-flash |
| Modalities | text and image classification |
Technical impact 3
Engineering value 4
Adoption signal 3
Maturity 3
Verification cost 2
Risk 2