Membership promo prompt
A copy-and-paste prompt for ChatGPT, Claude or Gemini that gets a professional membership promo on the first try, plus the cheapest model that does it well.
What most people type
instagram post for our gym's january promo: no signup fee and first month $19
It works, but the AI has to guess your brand voice, target audience and offer end date or terms, so the first answer usually needs another round. The version below asks for exactly what a professional would deliver.
The better prompt
Write an Instagram post for our gym's January promo: no signup fee and first month $19. Include: - A hook in the first line that stops the scroll. - A short caption that leads with the offer, in a [brand voice, e.g. energetic, friendly] tone for [target audience]. - The offer details exactly as given: no signup fee, first month $19. Add [offer end date or terms] and don't invent other perks, results claims or conditions. - One clear call to action: [sign up link, DM, or visit location]. - 5-8 relevant hashtags, including [gym name] and [city or neighborhood]. - Emojis used sparingly. Give 3 caption variants with different angles (for example new year motivation, price, community), plus a one-line suggestion for the image or Reel to go with each.
Replace the [brackets] with your details before you send it: brand voice, e.g. energetic, friendly, target audience, offer end date or terms, sign up link, DM, or visit location, gym name, city or neighborhood.
Why this version works
- Added hook, CTA and hashtag structure. Instagram posts need a hook, one call to action, hashtags.
- Asked for 3 caption variants. Gives options to test without extra rounds.
- Added placeholders for voice, audience, terms. Missing details a pro would need; nothing invented.
- Locked offer wording, banned invented perks. Keeps price and terms accurate.
What a professional membership promo prompt covers
- Hook and call to action
- Deadline placeholder
- Hashtags
Best AI model for this prompt
This is a light task: short social copy with clear facts; a small model handles it reliably. You don't need the most expensive model. The cheapest model at each company that handles it well:
| Company | Model | Per use | Per 1,000 uses |
|---|---|---|---|
| Anthropic | Claude Haiku 5.5cheapest | $0.00019 | $0.19 |
| OpenAI | GPT-6 Luna | $0.00019 | $0.19 |
| Gemini 3.1 Flash-Lite | $0.00057 | $0.57 |
Pay-per-use list prices for this prompt and its expected answer (about 350 tokens). On a monthly chat plan, the same choice shows up as more messages before you hit your limit. See today's AI prices.