ProductsProduct / feature launchLarge Language Models · Reinforcement Learning1 source · Oct 1, 2026

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

While classifier models have been around for some time, Jev introduces a new decision model concept into the world of AI — a model that produces bounded structured outputs cheaply, quickly and consistently that can be added into a workflow when a decision is required.

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Key points

  • Over the last few weeks, there has been lots of buzz around decision models such as Typesafe AI’s Jev System One model.
  • Today, we’re releasing two Cloudflare-trained decision models, Clef and Clef-flash, hosted on Workers AI.
  • How is Clef different from other decision models?
  • Although the market is getting increasingly saturated with decision models, Clef has some unique properties that make us excited to release it to the public.

Sources (1)

  • [1]Introducing Clef: our open-source decision models, and new RL fine-tuning platform
    Cloudflare Blog: AI · Oct 1, 03:34 PM
    While classifier models have been around for some time, Jev introduces a new decision model concept into the world of AI — a model that produces bounded structured outputs cheaply, quickly and consistently that can be added into a workflow when a decision is required.
    Over the last few weeks, there has been lots of buzz around decision models such as Typesafe AI’s Jev System One model.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 1, 2026unslothai/unsloth v0.1.902-beta: Command Palette + Desktop UI/UX
  2. Sep 30, 2026Cloudflare/clef-flash
  3. Sep 29, 2026Using Jev In Your Agent Harness
  4. Sep 29, 2026Language Models for Text Classification: From Bag-of-Words to Jev
  5. Jul 15, 2026huggingface/transformers v5.14.0: Release v5.14.0
  6. Jun 10, 2026DiffusionGemma: 4x faster text generation

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