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Laya vs Jev arena

Browser arena where local Laya and hosted Jev race in Snake and fight in a Mortal-Kombat-style game, with every move a real decision.

ServiceprototypeMIT
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Overview

Laya vs Jev Arena pits two typed decision models against each other: Laya, open source and running locally, and Jev, TypeSafe's closed model over its API. They race in a snake game and fight in a Mortal-Kombat-style arena, and every move is a real model decision rather than a script. Both sides receive the same state and typed questions, so the only difference is the model. It accompanies a Prompt Engineer 48 YouTube video.

A Python server serves the pages and exposes two backends with the same request and response shapes: Laya in-process via its router, and Jev proxied so the key never reaches the browser. You can choose a model per side, including a human player, change the seed for a different apple layout shared by both sides, and export JSON with score, decisions per second, p50 and p95 latency and tokens. The first Laya call takes 30 to 60 seconds to load checkpoints, done before the clock starts. A Docker image lets you host a human-versus-Jev game. JevK5's README uses this arena for its Snake demo.

What the decision model decides

TypeQuestionAnswers
ChoiceWhich direction should the snake turn next?(inferred)—
ChoiceWhich fighting move should the character make?(inferred)—

How it works

  1. Choose a model for each side (Laya, Jev or human)
  2. Game sends the same state and questions to both backends
  3. Each model's choice drives its character
  4. Stats track score, decision rate and latency
  5. Export results as JSON

Strengths

  • Same inputs for both models make the comparison fair
  • Key stays server-side
  • Seeded runs and exportable metrics
  • Docker deployment

Caveats

  • Game performance is not a general accuracy benchmark
  • Browser tab must stay in the foreground
  • Jev side needs a TypeSafe key

Getting started

git clone https://github.com/PromptEngineer48/laya-vs-jev-arena.git, pip install -r requirements.txt, add TYPESAFE_API_KEY to .env, python server.py 8740.

At a glance

Type
Service
Status
prototype
Language
Python
Runtime
Python server and browser games
Has code
yes
License
MIT

Use cases and integrations

How curated lists describe it

  • Model comparison: races an open local model against Jev through Snake and a Mortal-Kombat-style arena, the same game code driving both.

    yibie/awesome-jev

  • Laya (open source, local) vs TypeSafe Jev (API): two AI models race in Snake and fight in a Mortal-Kombat-style arena. Every move is a real model decision.

    logicrw/awesome-jev-projects

  • Laya (open source, local) vs TypeSafe Jev (API): two AI models race in Snake and fight in a Mortal-Kombat-style arena. Every move is a real model decision.

    hellogumbo/awesome-jev

  • A local open model and the hosted one play a snake race and a fighting game against each other, every move a real decision rather than a script.

    MrJev/awesome-jev

Frequently asked questions

Is the comparison fair?

Both models get the same state, questions and seed; only the model differs.

Do I need a TypeSafe key?

Only for the Jev side; Laya runs locally with no key.

Why is the first Laya move slow?

It downloads and loads checkpoints once, which takes 30-60 seconds before play starts.

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