Publié : 1 December 2025
Actualisé : 3 days ago
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📋 Table of Contents
ChatGPT has democratized access to conversational artificial intelligence. However, behind the intuitive user interface lies a universe of advanced commands, capable of radically transforming the quality and relevance of generated responses. These “prompt prefixes”, the cornerstones of optimized interaction, allow you to shape the model’s behavior, guide its reasoning, and constrain the format of its deliverables. Let’s explore 30 of these little-known tricks that will propel you to the rank of ChatGPT expert.
🤖 Mastering the Art of “Prompt Prefixes”
Contrary to popular belief, ChatGPT’s effectiveness is not limited to the clarity of the question asked. Adding a specific prefix at the beginning of a query acts as a signal, a subtle directive that influences how the model interprets and processes information. These commands, stemming from community practice and not officially documented by OpenAI, allow you to modulate the style, structure, or depth of the response.
The major advantage of these prefixes lies in their ability to refine the intention behind the query. By explicitly indicating the type of response expected, the user guides ChatGPT towards the desired format or level of detail, avoiding approximations and unnecessary reformulations. Some prefixes focus on restructuring content, while others act on the tone used or impose a rigorous thinking methodology.
🧰 Essential Prefixes for Custom Reformulation
Need a concise summary, a simplified explanation, or specific formatting? These prefixes are your go-to tools for transforming a raw response into an immediately usable deliverable:
/ELI5
Usage example: /ELI5: What is blockchain?
/TLDL
Usage example: /TLDL: Explain quantum physics.
/STEP-BY-STEP
Usage example: /STEP-BY-STEP: How to install Linux?
/CHECKLIST
Usage example: /CHECKLIST: What to pack for a trip?
/EXEC SUMMARY
Usage example: /EXEC SUMMARY: Renewable energy market analysis.
/BRIEFLY
Usage example: /BRIEFLY: What is inflation?
/FORMAT AS
Usage example: /FORMAT AS JSON: List the countries of Africa.
/SCHEMA
Usage example: /SCHEMA: SQL table structure for products.
/COMPARE
Usage example: /COMPARE: Advantages and disadvantages of solar vs nuclear energy.
/BEGIN WITH / END WITH
Usage example: /BEGIN WITH: “In my opinion,” / END WITH: “Sincerely.” Explain the challenges of global warming.
🧠 Improving the Quality of Reasoning
When faced with a complex question, it is crucial to ensure that ChatGPT does not simply provide a superficial answer. These prefixes allow you to probe the depth of reasoning and detect any shortcomings:
/CHAIN OF THOUGHT
Usage example: /CHAIN OF THOUGHT: Solve this logic puzzle.
/FIRST PRINCIPLES
Usage example: /FIRST PRINCIPLES: How does the Internet work?
📊 Summary Table of ChatGPT Commands
| Command | Description | Usage Example |
|---|---|---|
| /ELI5 | Explain like I’m 5 years old | /ELI5: What is nuclear energy? |
| /TLDL | Summarize in a few lines | /TLDL: The theory of evolution |
| /STEP-BY-STEP | Break down step by step | /STEP-BY-STEP: How to fix a computer |
| /CHECKLIST | Transform into a checklist | /CHECKLIST: Preparing for a job interview |
| /EXEC SUMMARY | Executive Summary | /EXEC SUMMARY: 2024 Marketing Strategy |
| /BRIEFLY | Very short answer | /BRIEFLY: What is Bitcoin? |
| /FORMAT AS JSON | JSON format | /FORMAT AS JSON: List of monuments in Paris |
| /SCHEMA | Generates a schema | /SCHEMA: Database for a library |
| /COMPARE | Compare elements | /COMPARE: Advantages and disadvantages of telecommuting |
| /BEGIN WITH / END WITH | Imposed start and/or end | /BEGIN WITH: “In conclusion,” / END WITH: “Thank you.” |
| /CHAIN OF THOUGHT | Display the reasoning | /CHAIN OF THOUGHT: Solve this logic problem |
| /FIRST PRINCIPLES | Reconstruct from the basics | /FIRST PRINCIPLES: How does a combustion engine work |
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