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

2026-10-05

Cloudflare has released Clef and Clef-flash, ‘Jev-like' open-source System 1 models that turn text or images into choices and probabilities. They can help route support tickets, classify websites, or decide when an agent should ask a human. Both run on Workers AI or locally, and Cloudflare is offering help fine-tuning them for specific tasks.