Prompt to compare two versions of a document
Paste the old and new versions of a contract, a quote or a procedure: the AI lists what has changed and highlights the changes that really matter.
Your prompt
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How do I compare two versions of a document with ChatGPT?
Extract the text of both versions, paste them one after the other with clear labels, then ask for a table of additions, deletions and changes with exact quotes and importance levels. For a word-by-word check, the Lunyce "Compare two PDFs" tool usefully complements the AI analysis.
How to use it
- Extract the text of both versions in the same way ("PDF to text" for PDFs).
- Paste the old version then the new one, say what you care about, then copy or open the prompt.
- Check each important change in the original documents.
Tips for better results
- For a word-by-word comparison, the Lunyce "Compare two PDFs" tool highlights differences right in your browser; then use the AI to explain their impact.
- For very long documents, compare section by section.
- Remove personal data before pasting text into an online AI.
Does AI spot every difference?
Not always, especially in long texts where a single changed word can slip past it. For an exhaustive comparison, use an automatic comparison tool such as "Compare two PDFs", then the AI to explain what the changes mean.