---
title: "Discussion on \"AI Format Wars: Does the Shape of Your Prompt Matter? (1,080 Evals Later)\" | Hashnode"
description: "Discussion on \"AI Format Wars: Does the Shape of Your Prompt Matter? (1,080 Evals Later)\". We tested 5 frontier models across 1,080 evaluations. JSON won. Short prompts won. Everything you thought you knew about prompt engineering is wrong."
url: "https://hashnode.com/posts/ai-format-wars/69c06af7d9da55a9a5ebd499"
---

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# [AI Format Wars: Does the Shape of Your Prompt Matter? (1,080 Evals Later)](https://blog.kaelux.dev/ai-format-wars?utm_source=hashnode&utm_medium=feed)

We tested 5 frontier models across 1,080 evaluations. JSON won. Short prompts won. Everything you thought you knew about prompt engineering is wrong.

Mar 22 · 5 min read · blog.kaelux.dev  
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-   [#ai](https://hashnode.com/tag/ai)
-   [#llm](https://hashnode.com/tag/llm)
-   [#machine-learning](https://hashnode.com/tag/machine-learning)
-   [#promptengineering](https://hashnode.com/tag/promptengineering)

## Written by

[Kristofer Jussmann](https://hashnode.com/@ker102)

@ker102 · Tallinn, Estonia

  
[View profile](https://hashnode.com/@ker102)

Agentic AI Architect and technical founder of Kaelux.dev

Devsecops engineer and founder

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