Public notice prompt
A copy-and-paste prompt for ChatGPT, Claude or Gemini that gets a professional public notice on the first try, plus the cheapest model that does it well.
What most people type
public notice that main street will be closed for repaving from march 3 to march 14
It works, but the AI has to guess your street section or cross streets, work hours and detour route, so the first answer usually needs another round. The version below asks for exactly what a professional would deliver.
The better prompt
Write a public notice announcing that Main Street will be closed for repaving from March 3 to March 14. Include: what is happening and where (the affected stretch of Main Street: [street section or cross streets]), the exact closure dates, the working hours if relevant ([work hours]), detour or alternate route information ([detour route]), access for residents, businesses, emergency vehicles and deliveries ([access arrangements]), parking restrictions if any ([parking rules]), what to do if the work is delayed or the weather changes the schedule, and a contact for questions ([department, phone, email or website]). Tone: clear, neutral and official, written for the general public of [city or town]. Put the key facts (what, where, when) in the first two sentences, then use a short bulleted list for detours and access details. Sign it from [issuing authority] with the notice date [date]. Don't invent details I haven't provided; use the placeholders for anything unknown. Keep it to one page, about 150-250 words.
Replace the [brackets] with your details before you send it: street section or cross streets, work hours, detour route, access arrangements, parking rules, department, phone, email or website, city or town, issuing authority and a few more.
Why this version works
- Added what a public notice must include. Residents need detours, access, parking and contacts.
- Set tone, audience and structure. Key facts first makes the notice easy to scan.
- Used placeholders for unknown details. Prevents invented routes, contacts or hours.
- Added a one-page length. Notices are short; stops rambling.
What a professional public notice prompt covers
- Detour placeholder
- Plain language
- Contact placeholder
Best AI model for this prompt
This is a light task: short, formulaic official notice; 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 | $0.00020 | $0.20 |
| OpenAI | GPT-6 Luna | $0.00020 | $0.20 |
| Gemini 3.1 Flash-Lite | $0.00058 | $0.58 |
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.