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

Post by **Michelle Chen, Alex Reneau and Kevin Flansburg**, published on **October 1, 2026** on the **Cloudflare** blog (~10-minute read, "AI Birthday" week). Cloudflare releases **Clef** and **Clef-flash**, its first in-house trained models, hosted on **Workers AI** and distributed as open source (Apache 2.0, Hugging Face), along with a reinforcement-learning fine-tuning service.

#Clef#Clef-flash#decision model

Michelle Chen · Alex Reneau · Kevin Flansburg — équipe Workers AI / plateforme IA · blog Cloudflare.

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Introducing System One Models & Jev

Announcement by **Diogo Almeida**, founder of **TypeSafe AI** (formerly of OpenAI, where he worked on instruction-following training methods), published on **September 15, 2026** on the company blog (~2,500 words). The text introduces a new class of models, **System One Models**, and their first model, **Jev**, in early access.

#System One#decision model#Jev

Diogo Almeida — fondateur de TypeSafe AI · ancien chercheur chez OpenAI (billet du blog d'entreprise).