Claude Prompt to Summarize Long Documents Accurately
A prompt designed for Claude's large context window to summarize long reports, contracts, or research papers without losing key details.
The Prompt
Summarize the following document in three parts: 1) a 3-sentence executive summary, 2) a bulleted list of the 5-8 most important facts, figures, or decisions, organized by section, 3) a short list of anything ambiguous, missing, or that requires a human decision. Do not add information that isn't in the document. Document: [PASTE OR ATTACH DOCUMENT]
Example
A 12-page vendor contract with pricing tiers and termination clauses.
A three-sentence summary of the contract's purpose and term length, a bulleted breakdown of pricing tiers and the termination notice period, and a flagged note that the auto-renewal clause lacks a specified cap on price increases.
Tips for Better Results
- Explicitly say "do not add information that isn't in the document" — this reduces the chance of Claude filling gaps with assumptions.
- For contracts, add "flag any clause that is unusually one-sided or non-standard."
- Ask for page or section references next to each bullet so you can verify quickly.
FAQ
How long a document can Claude handle?
Claude supports very large context windows, so it can process long reports and multi-chapter documents in a single pass — for extremely long files, splitting into logical sections still tends to produce more precise summaries.
Is this safe for confidential documents?
Avoid pasting sensitive personal, financial, or legal data into any AI tool unless you've confirmed the platform's data handling policy meets your requirements.