# Cloudflare releases Clef decision models and fine-tuning service

> Cloudflare says its open-source Clef models can return structured classifications, and it is offering customers hands-on fine-tuning help.

Oossa · 2026-10-01 · https://oossa.com/en/cloudflare-releases-clef-decision-models-and-fine-tuning-service

Cloudflare has released Clef and Clef-flash, two decision models hosted on its Workers AI service and available under an Apache 2.0 license. They return structured choices and probabilities, such as whether a support request is urgent and which team should handle it. Cloudflare says the models can also classify images and accept up to 64,000 tokens of context.

The company says Clef is available through Workers AI and on Hugging Face. It is also starting a hands-on fine-tuning service with its forward-deployed engineering team; a self-serve platform is planned for later, with no date given. Cloudflare reports Clef took 2.2 seconds to fetch, render and classify a website in an internal test, compared with 4.7 seconds for its fastest general model in that workflow.

## The facts

- Clef and Clef-flash are released under the Apache 2.0 license.
- Cloudflare reports a 2.2-second website classification workflow for Clef, versus 4.7 seconds for gpt-oss-120b.

## Why it matters

Developers building workflows that route support requests or classify websites can try Clef through Workers AI or run the open-source models themselves; how well they perform on a particular workload remains to be tested.

## Sources & references

1. [Introducing Clef: our open-source decision models, and new RL fine-tuning platform](https://blog.cloudflare.com/clef-decision-models/) – Cloudflare, 2026-10-01
2. [ggml-org/llama.cpp b11371](https://github.com/ggml-org/llama.cpp/releases/tag/b11371) – llama.cpp, 2026-10-03
3. [Cloudflare says its new Clef model means humans no longer need to be in the loop for AI agents](https://the-decoder.com/cloudflare-says-its-new-clef-model-means-humans-no-longer-need-to-be-in-the-loop-for-ai-agents/) – The Decoder, 2026-10-02
4. [Cloudflare Releases Clef and Clef-flash: Open-Weight Decision Models That Return Typed Probabilities Instead of Text](https://www.marktechpost.com/2026/10/01/cloudflare-releases-clef-and-clef-flash/) – MarkTechPost, 2026-10-02
5. [Clef: Open Weights decision model by Cloudflare](https://www.reddit.com/r/LocalLLaMA/comments/1wv4zzi/clef_open_weights_decision_model_by_cloudflare/) – Reddit r/LocalLLaMA, 2026-10-01
6. [Cloudflare tries to outplay Jev with open-weight Clef models](https://www.theregister.com/ai-and-ml/2026/10/01/cloudflare-tries-to-outplay-jev-with-open-weight-clef-models/5300649) – The Register, 2026-10-01

Last updated: 2026-10-03