aiedu.guide: independent, plain-English guides to new AI tools for developers

Who is aiedu.guide for?

Developers, indie builders and technical leads who want to know, quickly and honestly, what a new AI tool does, how to call it, what it costs, and when not to use it. You don't need a machine-learning background.

What is Jev?

Short answer: Jev is an AI model from TypeSafe AI that returns typed decisions with probabilities (a yes/no probability, a choice from options you define, or a score on levels you define) instead of generating text.

TypeSafe calls this new class of model "System One", after Daniel Kahneman's fast, intuitive System 1 thinking. You send Jev some text or JSON (the state) and a set of typed questions, and your code branches on the answers. It can't write replies or code, so it is usually paired with an LLM rather than replacing one. Our guides explain how.

Jev guides

• Jev API quickstart: your first call with curl, Python and TypeScript

  The endpoint, a first request, the official SDKs, how to read the answer, limits and error codes.

• How to get a Jev API key: four ways compared

  TypeSafe direct, OpenRouter, Vercel AI Gateway and Cloudflare Workers AI: keys, endpoints, model IDs, waitlist status.

• Jev vs LLM: when to use each

  What a decision model returns, when it beats an LLM, when it is the wrong tool, and how to combine both.

How are these guides written?

• Official sources first. Facts about products, prices and features come from the maker's own docs or pages, and each guide lists what we checked and when.
• Company claims are labeled. Speed and cost multipliers published by a vendor are presented as that vendor's claims.
• No invented numbers. No made-up stats, testimonials or quotes. If we couldn't verify something, we say so.
• Unofficial and independent. We are not affiliated with TypeSafe AI or any platform we cover. See the disclosure.