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

Start at the Jev developer guide (hub), or browse all 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.

• Noul vs Choice vs Score: which Jev question type to use

  When to use a Noul, a Choice or a Score, what each returns, and the mistakes that break thresholds.

• Jev model IDs by channel

  Model IDs, endpoints and field names on TypeSafe, OpenRouter, Vercel AI Gateway and Cloudflare, plus the noul vs boolean and confidence quirks.

• Jev confidence thresholds

  What confidence means, act and review bands for Noul, Choice and Score, and why TypeSafe sets no default.

Grok and Grok Bot guides

Start at the Grok developer guide (hub) or the Grok Bot guide (hub).

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.