Introducing Clef: Our Open-Source Decision Models, and New RL Fine-Tuning Platform
Cloudflare, Thursday, October 1st, 2026
Cloudflare releases Clef and Clef-flash, open-source decision models on Workers AI, plus an RL platform to fine-tune them on your data.
Cloudflare released two Cloudflare-trained decision models, Clef and Clef-flash, hosted on Workers AI.
Decision models produce bounded, structured outputs quickly, cheaply and consistently, making them suited to classification steps inside agentic workflows, in contrast to open-ended LLMs.
Cloudflare says Clef leads the Jev Decision Index benchmark and is Jev-API compatible, and it also launched a reinforcement learning platform that lets developers fine-tune decision models using their own data.