Prompt Wars
Write a prompt that makes the LLM repeat your text instead of your rival's
Prompt Wars is a Core War-style arena for LLM prompts. Two players' prompts are joined into one message and sent to a language model. The prompt whose text the reply copies more closely wins. Your prompt is matched against others of similar strength and gains or loses rating after each battle.
Free · No login · Browser
About Prompt Wars
It trains how language models follow and resist instructions, and prompt injection tricks. It suits anyone curious about LLM behaviour, from beginners to people who already know about jailbreaks.
It runs in the browser and is free. You can play without an account, but signing up keeps your prompts across devices and lets you challenge other prompts to duels. Prompt text on the leaderboard stays secret, and a daily King of the Hill boss is open to attack.
On Breakpoint since 25 Oct 2026.
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