Laya vs Jev Arena: a Snake race and a Mortal-Kombat-style fight, nothing scripted

# Laya vs Jev — AI vs AI Arena

Two AI models go head to head in a **snake race** and a **Mortal-Kombat-style fight**.
Every move is a real decision from the model — nothing is scripted.

- **Laya** — open source, Apache 2.0, runs **locally** on your machine · [GitHub](https://github.com/NandhaKishorM/laya) · [Hugging Face](https://huggingface.co/convaiinnovations/laya)
- **Jev** — TypeSafe's closed model, runs over their **API** · [announcement](https://typesafe.ai/blog/introducing-system-one-models-and-jev)

Both take the same input and answer the same typed questions, so the only thing that
changes between the two sides is the model. From the **Prompt Engineer 48** YouTube video.

---

## Quickstart

**You need:** Python 3.10+, a browser, and (for Jev) a TypeSafe API key from
[console.typesafe.ai](https://console.typesafe.ai). Laya needs no key.

```bash
git clone https://github.com/PromptEngineer48/laya-vs-jev-arena.git
cd laya-vs-jev-arena
pip install -r requirements.txt
```

Add your Jev key:

```bash
cp .env.example .env          # Windows: copy .env.example .env
```

Open `.env` and paste your key after `TYPESAFE_API_KEY=`.

Start the server:

```bash
python server.py 8740
```

Then open:

| | |
|---|---|
| Front page | http://localhost:8740/ |
| Snake race | http://localhost:8740/snake/ |
| Kombat | http://localhost:8740/fight/ |

Pick a model for each side from the dropdowns and hit **Start race** / **Fight**.

### Good to know

- **The first Laya call takes ~30–60 s** — it downloads and loads the checkpoints once.
  That happens during "Priming…", before the clock starts.
- **Keep the tab in the foreground.** Browsers throttle background tabs, and the game only
  advances while the page is drawing.
- **No key?** Set both sides to Laya — or play yourself with