Ex-OpenAI Researcher Launches Jev, a Decision-Making AI Model That Outpaces LLMs on Speed and Cost

Diogo Almeida, the OpenAI researcher who co-created ChatGPT's core training method, has unveiled Jev, a radically different kind of artificial intelligence model designed to compete not by talking better, but by deciding faster and cheaper. Launched September 15 by TypeSafe AI, Jev is a System One model—a category distinct from the large language models that dominate consumer AI. While ChatGPT, Gemini, and Claude generate text token by token, Jev directly outputs structured decisions: yes-or-no answers, probability scores, and classifications, without explanatory text.