GoKawiilCloudflare releases open-source Clef and Clef-flash decision models
Cloudflare has launched Clef and Clef-flash, two decision models hosted on Workers AI and compatible with the Jev API. The company says Clef currently leads the Jev Decision Index benchmark, and both models are open-sourced on Hugging Face under an Apache 2.0 license. Cloudflare also introduced a reinforcement learning product that lets customers fine-tune Clef for their own use cases.
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Decision models like Clef aim to give AI agents fast, consistent, structured outputs for routing and classification tasks, which could reduce the need for human oversight in routine workflow decisions. Open-sourcing the models and offering fine-tuning via reinforcement learning may position Cloudflare to compete with other decision-model providers such as Typesafe AI, while also encouraging developers to build on Cloudflare's own infrastructure.
- Cloudflare released Clef and Clef-flash, two decision models hosted on Workers AI.
- The models are open-sourced on Hugging Face under an Apache 2.0 license and are Jev-API compatible.
- Cloudflare also launched a reinforcement learning product to let customers fine-tune Clef for specific use cases.
Source: blog.cloudflare.com, 2026-10-01
Published there as: “Clef: our open-source decision models”
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