Build custom GPTs without code: plan the job, write the instructions, add files and test your assistant before you share it.
Build your own GPT assistants for work and home.
A practical guide to building custom GPTs with plain words and ordinary files, from the first plan to ten ready-to-paste GPTs, plus a fillable companion planner with every prompt, spec sheets and test logs.
Custom GPTs: who it’s for
- You paste the same paragraph of rules into ChatGPT several times a week: your tone, your word limit, your sign-off, the price list.
- You have seen someone else’s GPT do one job beautifully and thought “I could build one for my work”, then worried it was a coding thing.
- You tried the builder once, chatted for ten minutes, and got a GPT with a vague name that forgot your rules by the third message.
Custom GPTs: what’s inside
- Start Here, self-check and clickable contents
- Start here + self-check
- What a GPT is
- Planning one
- Instructions
- Knowledge files
- Actions basics
- Testing
- 10 GPTs to build
- Cheat sheet, 7/30-day plan, printable toolkit
- Fillable companion planner (25 pages)
How to use the custom GPTs guide in 3 steps
- Open Start Here and tick the 2-minute self-check — it tells you where to begin.
- Pick one chapter, copy a prompt, fill the [brackets] and run it on a real task today.
- Print the cheat sheet and follow the 7-day plan; keep your work in the fillable planner.
Formats and devices
- Ebook PDF in A4 and US Letter (73 pages A4), clickable contents and bookmarks
- Companion planner PDF, fillable on screen or printable (25 pages)
- 1-page Start Here PDF
- Works on phone, tablet and computer; prints clean in colour or black and white
Part of The Complete No-Hype Guide to ChatGPT
Written against the GPT-6 models in ChatGPT (Luna, Sol and Astra).
This custom GPTs guide is part of The Complete No-Hype Guide to ChatGPT. For account and feature questions, see the official OpenAI Help Center.
An independent, unofficial guide. Not affiliated with the companies whose tools it covers.
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