Fable 5 just came back and somebody's already leaked the entire system prompt on the internet.

@kyle.s.painter

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Promoted product

Claudehttps://www.anthropic.com ↗

Why it worked

The video leverages the 'leaked information' trope to create immediate curiosity and authority, while offering a practical, high-value utility (improving AI performance) that encourages engagement through comments.

Summary

The creator discusses the leak of the system prompt for Anthropic's Claude 5 model. He explains how users can apply these instructions to other AI models to improve performance and reduce costs.

Structure

1Hook about the Claude 5 system prompt leak
2Explanation of the prompt's size and complexity
3Demonstration of applying the prompt to other models
4Benefits of using the prompt for output and cost
5Call to action to comment for the link

Product placement

Claude (Anthropic) is the subject of the video, with its system prompt being the focus of the discussion.

Call to action

Comment "FABLE 5" to receive the link.

Original caption

Fable 5 came back. Its playbook didn’t stay private for long. Comment “FABLE 5” 👇 #ClaudeAI #Anthropic #ArtificialIntelligence #ClaudeFable #ClaudeMythos

More from @kyle.s.painter

On-screen text

NOW SHOWING FABLE 5 FABLE 5 PROMPT LEAKED SOMEBODY'S ALREADY LEAKED THE ENTIRE SYSTEM PROMPT 120,000 CHARACTERS 1.5K LINES ANTHROPIC AMAZING EXACT INSTRUCTIONS GLM 5.2 KIMI 2.7 COMMENT "FABLE 5"

Transcript

Fable 5 just came back and somebody's already leaked the entire system prompt on the internet. And this isn't just some basic prompt. It's 120,000 characters long and over 1,500 lines. And it covers the exact set of instructions Anthropic used to control how their most powerful model thinks, plans, and gets things done. And what's amazing is you can take these exact instructions and inject them into cheaper open source models like GLM 5.2 or Kimi 2.7. That way they follow the same playbook that Anthropic built for the world's fastest AI models. And this will significantly improve your output and lower your bills. So if you want it for yourselves, just comment FABLE 5 and I'll send you guys the link directly.