AI tool guides
Independent, plain-English guides to new AI models and developer tools. Each guide opens with a short direct answer under every question, then the detail, and ends with the official sources we checked and the date.
Short answer: We have guides for Jev, the System One decision model from TypeSafe AI, for the Grok API from xAI, and for the Grok Bot app, plus a hub page for each. The Jev guides cover a quickstart, a comparison of the four ways to get API access, when to use Jev instead of an LLM, which question type to use, model IDs and field names on each channel, and how to choose confidence thresholds. The Grok guides cover a quickstart, pricing and rate limits, model IDs by channel, function calling and structured outputs, and the web search and X search tools. The Grok Bot guides cover setup and the shared cloud computer, plus a short note on hiring your first Bot. We'll add more tools here as we cover them.
Jev (TypeSafe AI)
Start at the Jev developer guide (hub) for the latest model ID, price, limits and channels at a glance, plus a dated changelog.
Jev API quickstart: your first call with curl, Python and TypeScript
Jev is called with POST https://api.typesafe.ai/v1/systemone: you send some text (the state) plus typed questions and get typed answers with probabilities back. The guide covers a first curl call, the official SDKs, limits and error codes.
How to get a Jev API key: four ways compared
There are four documented routes: TypeSafe direct, OpenRouter, Vercel AI Gateway and Cloudflare Workers AI. Only the first gives you a TypeSafe key; the others use the platform's own key and billing.
Jev vs LLM: when to use a decision model and when to use a text model
Use Jev when the answer is one of a known set (route, classify, score or flag) and an LLM when you need generated text. The guide covers when Jev is the wrong tool and how to combine both.
Noul vs Choice vs Score: how to pick the right Jev question type
Jev from TypeSafe AI answers three typed question types. Use a Noul when you need the probability that a yes/no statement is true, a Choice to pick exactly one option from a fixed, unordered set, and a Score to place something on ordered levels you describe.
Jev model IDs by channel: endpoints, field names and schema quirks
The model ID differs by channel:
jev-latestor pinnedjev-1.13.0on TypeSafe,typesafe/jev-1.13or~typesafe/jev-lateston OpenRouter,typesafe-ai/jevon Vercel AI Gateway, andtypesafe/jevon Cloudflare Workers AI.Jev confidence thresholds: how to choose act, review and escalate bands
There is no universal Jev confidence threshold. TypeSafe's own guidance is to split answers into bands (act, proceed with caution, don't act), set stricter cutoffs for riskier actions, and tune the numbers on your own data.
Grok (xAI API)
Start at the Grok developer guide (hub) for the grok-4.7 model ID, pricing, rate limits and channels at a glance, plus a dated changelog.
Grok API quickstart: your first
grok-4.7call with curl, Python and TypeScriptTo make your first call, put your API key in
XAI_API_KEYand send a request to the Responses API with the model set togrok-4.7.Grok API models, pricing and rate limits
On the xAI API,
grok-4.7costs $2 per million input tokens and $6 per million output tokens below 200K tokens. At 200K and above, every token in the request is billed at double those rates.Grok 4.7 model IDs by channel
The model ID is
grok-4.7on the xAI API,x-ai/grok-4.7on OpenRouter,spacexai/grok-4.7on Vercel AI Gateway andxai/grok-4.7on Cloudflare.Grok function calling and structured outputs
A streamed tool call arrives whole in one chunk, xAI's docs disagree on whether tool arguments are strict,
additionalPropertiesdefaults tofalse, andstopand the penalty parameters return an error.Moving from Grok Live Search to the
web_searchandx_searchtoolsSearch on the xAI API now runs through
web_searchfor web pages andx_searchfor posts on X. The old Live Search guide URL redirects to the Web Search tool page.
Grok Bot
Start at the Grok Bot guide (hub) for what the app is, which plans include it, web and app prices, and the shared cloud computer.
Grok Bot setup: install, plans, prices and your first Bot
Download Grok Bot from x.ai/bot, sign in with a Cursor account, and use a paid Cursor plan, a linked SuperGrok or X Premium+ subscription, or the free trial.
Grok Bot security: the shared computer, approvals and what Bots can see
Every Bot on an account shares one cloud computer. Each Bot gets its own screen, but logins, files and command-line credentials are shared.
How to hire your first Grok Bot: 5 takeaways from Brian Roemmele's guide
In an opinion piece on X (4 Oct 2026), Brian Roemmele argues you should set up a Grok Bot like a new hire, not like a script.
Can I request a guide for another AI tool?
Yes. Tell us which tool through the contact page. We are not affiliated with TypeSafe AI or any vendor we cover; see the disclosure.