I Made Two AI Models Compete on the Same Prompt. Now I Need You to Finish What I Started.

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The Results Changed How I Pick My Tools.

I started something. I need the internet to finish it.

I have a challenge sitting live on VibeCode Arena right now.

Two stick figures. Attack buttons. Health bars. A game that is functional, slightly chaotic, and absolutely begging for someone to come in and make it either significantly better or significantly more ridiculous.

I am genuinely not sure which outcome I want more.

Here is how it got there. And more importantly, here is why I need you in it.

What even is VibeCode Arena

Quick context because not everyone has come across this yet.

VibeCode Arena by HackerEarth is a platform where you watch AI models compete on the same prompt in real time. Two models generate simultaneously. You pick the better output before you know which model produced which. The reveal only happens after you commit.

No brand bias. No habit. Just output vs output.

People are building all kinds of unhinged stuff on here. Retro terminals that type your horoscope like a Linux command. Calculators that gasp when you divide by zero. Pomodoro timers that roast you when you overstay your break. The challenge feed is honestly one of the more entertaining corners of the developer internet right now.

Here is what I built and how it happened

I typed six words: “design a game with stick figures fighting.”

Two outputs came in. One was clean and structured but felt like a textbook example. The other felt like an actual game. Player 1 attack button. Player 2 attack button. Health bars. The stick figures had energy. You could feel the chaos of it.

I picked the second one.

The reveal: Codestral-2508.

A model I had never seriously used before. The blind vote forced me to judge on output alone and Codestral absolutely won that round. That alone was worth the session.

But here is where it gets interesting.

After the duel, you can make it a challenge

Once you pick your winner on VibeCode Arena, you can open that output as a community challenge. Anyone on the platform can jump in, take that base output, direct AI to improve it, and submit their version. Each submission gets scored. A leaderboard builds up.

It is like a collaborative commit history, except the whole community is contributing and nobody is writing the code directly. Everyone is directing AI from different angles, with different ideas, with different things they think would make it better.

I just did exactly that with the stick figure game.

It is live right now. And nobody has touched it yet.

This is where you come in

The game works. It is functional. Player 1 and Player 2 can battle it out and someone wins.

But I know it could be so much more.

Better animations. Sound effects. A proper win screen. Maybe the stick figures get names. Maybe there is a combo system. Maybe someone completely reimagines the attack mechanic. Maybe someone just makes it look absolutely incredible.

I have no idea what someone else will see in this that I missed. That is the part I am genuinely curious about.

So here it is. My challenge. Come make it better, weirder, or both.

Join here: [VIBECODE ARENA CHALLENGE LINK]

Why this is actually worth your time

Beyond the fun of it, doing this on VibeCode Arena is quietly building something useful.

When you run a duel and vote blind, you stop being a user of AI and start being an evaluator of it. You develop real pattern recognition about which models handle which kinds of tasks well. That judgment, being able to look at two outputs and know specifically what is better and why, is the actual skill that matters right now.

And when you contribute to a challenge, you are practicing the other half of it. Taking a starting point, deciding what it needs, and directing AI to get there. That is the loop that is becoming the job.

The stick figure game is a low-stakes way to practice both. Which is honestly the best kind of practice.

Come ruin it in the best possible way

The challenge is open. The leaderboard is empty. First mover advantage is real.

Show me what you see in this that I didn’t.

Join the challenge: https://vibecodearena.ai/share/7a0a5dac-5ea5-4d90-816b-235de568da59

I started it. Where it goes is up to you now.

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I Made Two AI Models Compete on the Same Prompt. Now I Need You to Finish What I Started. was originally published in Coinmonks on Medium, where people are continuing the conversation by highlighting and responding to this story.