Clef

Cloudflare has released Clef and Clef-flash, two open-weight decision models that return probabilities over predefined answer options instead of generating text. The company claims median latencies of 39 ms and 209 ms, against just over 524 ms for TypeSafe AI's Jev. Both support text and images and are API-compatible with Jev.

Cloudflare published Clef on Hugging Face: a 27B multimodal model that takes a state and a schema of typed questions and returns a probability for every allowed option in a single forward pass. It is post-trained from Qwen3.8-27B and released under Apache-2.0. Benchmark results are from Cloudflare's internal Decision Index 0.2.1 run.