Know exactly what changed in a renewal before you sign
It finds the quiet changes, like a higher late fee or a longer notice period, buried on page nine.
Published . Steps as of October 2026.
How do I see what changed between my old and new lease?
Upload both versions to Claude, ChatGPT or Gemini and ask for a line-by-line comparison in plain words. At home, it works the same way for a lease, an insurance policy or a phone plan. A business owner can run it on a vendor or client renewal. A clear PDF of each version works best. It explains the wording but it isn't legal advice, so take the flagged questions to a professional when the stakes are high.
A sketch of what you'll get back.
Your prompt
Fill in your details. Skip any you like.
Claude and ChatGPT open with your prompt already typed in. Gemini can't be filled in from a link, so its button copies your prompt: paste it into the new chat.
The prompt that gets copied
I've attached two versions of the same agreement: the old one and the new renewal I've been asked to sign. It's a [AGREEMENT TYPE, e.g. apartment lease]. Compare them line by line and list every change in plain words. Put the changes in a table with four columns: what changed, the old wording, the new wording, and what it means for me in everyday terms. Start with money: price, payment dates, late fees, deposits and automatic increases. Then cover length, renewal and cancellation terms, notice periods, and anything that was removed. Flag the three changes I should ask about first, and write them as short, polite questions I can send to [WHO YOU DEAL WITH, e.g. my landlord]. Don't give legal advice. If something's unclear, say so and suggest I ask a professional.
Upload last year's agreement and the new renewal, and get a plain-words list of every change, from price and payment terms to new fees, plus questions to ask before you sign.
Step by step
- Open Claude, ChatGPT or Gemini and start a new chat
- Attach the old agreement and the new renewal as PDFs
- Paste the prompt and fill in what kind of agreement it is
- Read the change table and send the three questions before you sign
What you'll get
A side-by-side table of every change in plain words, plus three polite questions to send before you sign.
- Made for
- Everyone, Small business owners
- Works in
- Claude, ChatGPT, Gemini
