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What Is Jev?
Most AI models today are designed to generate text. We ask a question, and they respond with explanations, paragraphs, or even entire articles. But what if we don’t need a lengthy response? What if we just need AI to make a quick decision?
That’s where Jev, an AI model developed by a startup called TypeSafe AI, comes in.Unlike traditional Large Language Models (LLMs), Jev doesn’t generate text responses. Instead, it selects answers from predefined options and returns probabilities for those answers.
TypeSafe calls Jev a System One Model.
Interestingly, Jev is named after William Stanley Jevons, a British economist associated with Jevons Paradox, which describes how increased efficiency can sometimes lead to greater overall resource consumption.
What Is a System One Model?
The concept of System 1 and System 2 thinking comes from Daniel Kahneman’s book Thinking, Fast and Slow.
System 1 — Fast and Automatic Thinking
Let’s say I ask you:
What is 2 × 2?
You instantly know the answer is 4 without calculating it step by step.
That’s System 1 thinking.
System 2 — Slow and Deliberate Thinking
Now, what is 17 × 24?
You might need to calculate it step by step to get the answer, 408.
