Jev Gomoku — five in a row vs the AI
Play five-in-a-row against Jev, TypeSafe AI's decision model. You place a stone; Jev answers with one real API call per move. First to five in a row wins — no key, just play.
How Jev plays Gomoku
This is not a hand-written game engine. Every time it is Jev's turn, the current board is sent to the Jev API as a single typed decision: a short list of candidate points near the action, and a choice question asking which one to play. Jev returns its pick — with a calibrated probability behind it — in roughly 100–300ms, and we drop the stone. You are playing against a general decision model making one real call per move.
Because each move is a normal API request, you can watch the same thing developers see when they build on Jev: the latency of the call and its cost (a fraction of a cent) are shown right on the board. It is the exact choice / score / noul decision you would put inside your own product — here it just happens to be choosing squares.
What is Jev?
Jev is TypeSafe AI's first System One model. Instead of writing prose like a chatbot, it reads a situation and returns a typed, calibrated decision — a choice between options, a score on a scale, or a yes/no probability — in tens to hundreds of milliseconds, with no hallucinations. That is what lets it act as a live game opponent here: picking a move is exactly the kind of small, fast, bounded decision it is built for.
The same model powers ticket routing, content moderation, lead scoring, agent tool-call guardrails and model routing in real products. Gomoku is just a fun, visible way to see it decide.
Tips for beating Jev
- Build two open-ended threats at once — Jev can only block one point per move.
- Watch for your own four-in-a-row: an open four is an immediate win Jev often cannot stop.
- Keep your stones connected near the centre, where lines have the most room to grow.
- Jev is a general decision model, not a dedicated Gomoku engine, so tactical double-threats work well against it.
FAQ
Is Jev Gomoku free to play?
Yes. It runs in your browser with no API key and no signup — each of Jev's moves is a free, rate-limited call to the live Jev decision API.
Does Jev actually decide each move, or is it a scripted bot?
Jev decides each move for real. On its turn the board is sent to the Jev API and it returns a typed choice of where to play. It is not a pre-programmed minimax engine — it is a general decision model choosing a point.
Can I beat Jev at Gomoku?
Often, yes. Jev is a general System One decision model, not a specialised Gomoku engine, so classic tactics like building two simultaneous threats tend to work. That is part of the fun — you are testing a live AI, not a solved game bot.
How fast and how expensive is each move?
Each move is a single API call that typically returns in about 100–300ms and costs a fraction of a cent in input tokens — the page shows the live latency and running cost so you can see it.
More: Watch Jev play 2048 · All decision games · Jev playground · Jev API docs