First line has to work alone above the fold

A September 2026 caption guide notes that every major feed cuts text long before the character limit, so the first line is the whole ad. Build that fold rule into every caption prompt: a specific claim, number or situation, with no rhetorical question and no 'we're excited'. The tool used here is ChatGPT. Pricing listed for ChatGPT: Free; Plus $20/mo.

Done with CChatGPT

"The first line is the whole ad."aiforthemarketer.com

How do you do it, step by step?

A September 2026 caption guide notes that every major feed cuts text long before the character limit, so the first line is the whole ad.
Build that fold rule into every caption prompt: a specific claim, number or situation, with no rhetorical question and no 'we're excited'.
Copy the prompt on this page into ChatGPT and fill in your own details.
Edit the output in your own voice and check any facts before you publish.

Which tool does this use?

ChatGPT. See all ChatGPT use cases or more in Instagram.

What does it cost?

Free; Plus $20/mo

What should you watch out for?

Features and prices change. Check the source below before you rely on it, and edit anything AI writes before you publish it.

What prompt should you use with ChatGPT?

Rebuild any prompt with the prompt helper

You are an Instagram content editor.

Context:
- I write for [WHO YOU WRITE FOR] on [YOUR PLATFORM].
- My voice: [YOUR VOICE]
- My goal: [YOUR GOAL]

Task:
Write [N] Instagram captions for [AUDIENCE] about [TOPIC]. Job: [SAVES / SHARES / PROFILE VISITS]. Rules: the first line must work alone under 10 words with a specific number, claim or situation; no questions and no emoji in line one; body 40 to 120 words; one CTA matched to the job; hashtags listed separately. Label each variant by hook type: claim, number or situation.

Constraints:
- Avoid [WHAT TO AVOID].
- Use only facts I give you. Don't invent stats, quotes, names or examples. Write [NEEDS DETAIL] wherever something is missing.
- If something above is still in brackets or unclear, ask me about it before you start.

Output format:
Follow the counts and format given in the task. Plain text I can paste straight into [YOUR PLATFORM], numbered if there is more than one item.

Self-check before you answer:
- Did you follow every constraint and the output format?
- Does it sound like my voice and not generic AI writing? Cut filler openers and buzzwords.
- Is every claim backed by something I gave you, or marked [NEEDS DETAIL]?
Fix anything that fails, then give me the result.

Make this prompt yours fill in what you know; the prompt updates as you type

Anything left in [BRACKETS] is for you to fill in, or the AI will ask you. Nothing you type leaves your browser. Want to rebuild a prompt you found elsewhere? Use the prompt helper.

Reverse-engineer a prompt paste a prompt or an output you liked and get a meta-prompt

Your meta-prompt

Paste this into ChatGPT or Claude. It will ask you questions one at a time, then write a prompt tailored to you.

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Frequently asked questions

How do I first line has to work alone above the fold?

Which tool do I need for this, and what does it cost?

This use case uses ChatGPT. Pricing listed for it: Free; Plus $20/mo. Check chatgpt.com for current prices.

What prompt can I use?

You are an Instagram content editor. Context: - I write for [WHO YOU WRITE FOR] on [YOUR PLATFORM]. - My voice: [YOUR VOICE] - My goal: [YOUR GOAL] Task: Write [N] Instagram captions for [AUDIENCE] about [TOPIC]. Job: [SAVES / SHARES / PROFILE VISITS]. Rules: the first line must work alone under 10 words with a specific number, claim or situation; no questions and no emoji in line one; body 40 to 120 words; one CTA matched to the job; hashtags listed separately. Label each variant by hook type: claim, number or situation. Constraints: - Avoid [WHAT TO AVOID]. - Use only facts I give you. Don't invent stats, quotes, names or examples. Write [NEEDS DETAIL] wherever something is missing. - If something above is still in brackets or unclear, ask me about it before you start. Output format: Follow the counts and format given in the task. Plain text I can paste straight into [YOUR PLATFORM], numbered if there is more than one item. Self-check before you answer: - Did you follow every constraint and the output format? - Does it sound like my voice and not generic AI writing? Cut filler openers and buzzwords. - Is every claim backed by something I gave you, or marked [NEEDS DETAIL]? Fix anything that fails, then give me the result.

What are related use cases?

Batch a month of Instagram carousels in one sitting (ChatGPT)
Fill carousel templates from a spreadsheet (Canva)
Add captions to an Instagram Reel (Descript)
Write alt text for Instagram images (ChatGPT)
Run seven tests before you trust 'writes in your voice' (ChatGPT)
Don't restate the Facebook link preview (ChatGPT)

Where does this come from?

Checked Oct 17, 2026.

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Last updated Oct 17, 2026