Jev went from peak hype to disillusionment in record time
The Rise and Fall of Jev

Jev, a general-purpose classifier pitched as a "System One Model" by an ex-OpenAI founder, blew up on Hacker News and faded almost as fast. The author walks through the marketing playbook — name-dropping ChatGPT, Jevons' paradox, and Kahneman's System One — and argues it can't hallucinate but is still often wrong, while open-weight models beat it on cost. The real takeaway: four years of AI progress has been incremental, not revolutionary, and the industry is starving for genuine innovation.
It cannot hallucinate, but it can still be wrong. It is even more wrong than conventional language models, and in that sense "system one" is the right naming.