# Workers AI - Introducing Clef: Cloudflare's first open-source decision models, now on Workers AI

Publisher-attributed story with a reviewed brief or permitted publisher paragraph. The original publisher is responsible for the linked reporting.

- Publisher: Cloudflare Developers
- Category: AI
- Original publication time: 2026-10-01T13:00:00Z
- First observed by NexusTechWire: 2026-10-01T15:54:34Z
- Original source: https://developers.cloudflare.com/changelog/post/2026-10-01-clef-workers-ai/
- NexusTechWire record: https://nexustechwire.com/news/news-ba3c7cb2551e7bbcd861

## The brief

Cloudflare has introduced Clef and Clef-flash on Workers AI for applications that need structured decisions instead of generated prose. The models return probabilities for defined answers, supporting tasks such as routing requests or escalating cases to people. Cloudflare says it has released the weights under Apache 2.0 and is seeking design partners for a reinforcement-learning fine-tuning service.

AI-assisted NexusTechWire summary, checked against the linked source on 2026-10-01T19:12:54Z. Not independent reporting.

Source license: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Source material adapted into an original NexusTechWire brief. Original source license applies.

Read the full original: [Cloudflare Developers](https://developers.cloudflare.com/changelog/post/2026-10-01-clef-workers-ai/)

This record does not reproduce the complete article or represent independent confirmation of every source claim.