Claude Prompt for Summarizing a Document
Summarizing a document is one of the tasks where Claude excels the most. Whether you have a 50-page report, a dense scientific article, or a complex legal contract, Claude can extract the essentials in seconds. But the quality of the summary depends directly on the precision of your prompt. A vague prompt like 'summarize this text' will produce a generic summary that will likely miss the points that matter to you. In contrast, a well-structured prompt—specifying the target audience, desired level of detail, output format, and aspects to prioritize—turns Claude into a remarkably efficient summarization assistant. In this guide, you will find optimized prompts to obtain clear summaries that are faithful to the source document and tailored to your specific needs. Whether you are a student, professional, or researcher, these prompts will save you hours of reading while capturing essential information without distortion or critical omissions.
Paste in your AI
Paste this prompt in ChatGPT, Claude or Gemini and customize the variables in brackets.
You are a document summarization expert. Summarize the following document following these guidelines:
-
Summary Structure:
- A hook sentence capturing the central thesis or objective of the document
- The 3 to 5 key points, ordered by importance
- The main conclusions or recommendations
- The most significant numerical data (if applicable)
-
Rules:
- Target length: approximately 20% of the original document
- Stay faithful to the content without adding personal interpretation
- Preserve important nuances and reservations expressed by the author
- Use clear and accessible language
- Flag any ambiguous or contradictory elements in the document
-
Output Format:
- Start with a line "📄 Summary of: [document title]"
- Use bullet points for key points
- End with a "Key takeaway" section in one sentence
Document to summarize:
[Paste your document here]
Personalize this prompt with Léa
Answer 3 questions and Léa tailors the prompt to your situation.
Why this prompt works
This prompt works because it imposes a hierarchical structure that forces Claude to sort information by importance rather than simply condensing the text linearly. The 20% constraint forces the model to make relevant editorial choices, while the instruction to preserve nuances avoids overly simplistic summaries. Finally, the formatted output framework ensures a directly usable result.
Use Cases
Variants
Expected Output
You will obtain a structured summary that faithfully captures the essence of the document, with key points prioritized and important numerical data highlighted. The summary will be directly usable for decision-making, sharing with colleagues, or quick content review.
Frequently Asked Questions
What is the maximum document length that Claude can summarize?
Claude can process very long documents thanks to its large context window (up to 200,000 tokens, which is roughly 150,000 words or 500 pages). For documents exceeding this limit, break them down into logical sections and summarize each section separately, then ask Claude to produce a meta-synthesis from the partial summaries.
How do I ensure the summary doesn't distort the meaning of the original document?
Include this explicit instruction in your prompt: "Quote key passages from the original document in quotation marks to support each point in your summary." You can also ask Claude to indicate its confidence level for each summarized point, or to list elements it intentionally omitted so you can verify that no critical information was left out.
Can I ask Claude to summarize a document in a specific format like a table or bullet points?
Absolutely. Claude adapts to any output format you specify. You can request a table with columns like "Theme / Key Point / Importance," a hierarchical bulleted list, a summary in FAQ format, or even a visual format like a text-based mind map structure. Simply specify the desired format in your prompt and Claude will structure its response accordingly.
Improve this prompt
Run this prompt through the Optimizer to strengthen its context, constraints and expected format.
Improve this prompt with the OptimizerComments
- LéaAI
Astuce : pour un document très long (>50 pages), réduisez la longueur cible à 10% pour éviter un résumé trop dilué. Variante utile : ajoutez une contrainte « ignore les répétitions évidentes » pour gagner en concision si le document est redondant.
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