# Introducing Clef: our open-source decision models, and new RL fine-tuning platform

DevFeed: [Introducing Clef: our open-source decision models, and new RL fine-tuning platform](<https://devfeed.tech/articles/introducing-clef-our-open-source-decision-models-and-new-rl-fine-tuning-platform-63566.md>)

Original publisher: [Read original article](<https://blog.cloudflare.com/clef-decision-models/>)

Author: Kevin Flansburg

Published: 2026-10-01T15:34:02Z

Content type: release

Language: en

Sources: [Cloudflare Blog](<https://devfeed.tech/sources/cloudflare-blog.md>)

Topics: [rlhf](<https://devfeed.tech/topics/rlhf.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [Open Source Models & Datasets](<https://devfeed.tech/topics/open-source-models-datasets.md>), [Fine-tuning](<https://devfeed.tech/topics/fine-tuning.md>), [CI/CD](<https://devfeed.tech/topics/cicd.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [ai-gateway](<https://devfeed.tech/tags/ai-gateway.md>), [ai-platform](<https://devfeed.tech/tags/ai-platform.md>), [birthday-week](<https://devfeed.tech/tags/birthday-week.md>), [build](<https://devfeed.tech/tags/build.md>), [building](<https://devfeed.tech/tags/building.md>), [decision-models](<https://devfeed.tech/tags/decision-models.md>), [developers](<https://devfeed.tech/tags/developers.md>), [machine-learning](<https://devfeed.tech/tags/machine-learning.md>), [models](<https://devfeed.tech/tags/models.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [platform](<https://devfeed.tech/tags/platform.md>), [reinforcement-learning](<https://devfeed.tech/tags/reinforcement-learning.md>), [workers-ai](<https://devfeed.tech/tags/workers-ai.md>)

## AI overview

Cloudflare is releasing Clef and Clef-flash, open-source decision models hosted on Workers AI for fast, structured classification in agent workflows. The models support text and image classification, and Cloudflare describes their training approach, benchmarks, and use in internal workflows. A new service lets customers fine-tune Clef for their workloads, with a self-serve platform planned.

## Source excerpt

We are introducing Clef and Clef-flash, open-source decision models hosted on Workers AI for high-speed classification and agentic workflows. Also launching: a new reinforcement learning platform that allows developers to fine-tune decision models using their own data.