Your voice.
Better words.
Give ChatGPT a writing style that sounds more like you, with a practical prompt kit and a simple editing routine.
The Human Writing Prompt Kit
Identify repeated AI writing habits, turn them into rules, and save those rules as ChatGPT Custom Instructions. The strongest version also includes examples of your writing. “Human” is not a magic setting; specificity, a point of view, and careful editing matter more than banning a few phrases.
One useful step at a time.
- 01Find your voice
- 02Set the rules
- 03Save instructions
- 04Edit with care
Start with your voice sample
Collect two or three short passages you wrote yourself. Choose examples you would be happy to publish. Remove private information. Mark what you like: sentence length, formality, humor, contractions, directness, and how you explain examples. Do not use another writer’s distinctive voice without permission.
Prompt A: diagnose the draft
Paste a draft and, if possible, your own sample.
Review this draft for writing that feels generic or unlike me. Identify only patterns you can point to in the text: empty openings, repeated sentence shapes, vague claims, unnecessary transitions, inflated adjectives, clichés, robotic lists, or punctuation I rarely use. Quote a short example of each pattern and explain the problem in plain English. Compare it with my voice sample if provided. Do not rewrite yet. Ask up to three questions about audience and purpose if needed.
Audience: [who will read it]. Purpose: [what it should help them do or understand]. My sample: [paste]. Draft: [paste].
Prompt B: build a personal rule set
Turn the patterns above into a compact writing guide for me. Include 5-8 positive rules and 3-5 things to avoid. Preserve clarity and accuracy. Say when a rule should have an exception. Then write a Custom Instructions version under 1,500 characters so it fits the smallest current ChatGPT limit. Do not claim that a style rule can make text undetectable or guarantee a particular result.
Copy-ready Custom Instructions
You can start with this version, then replace the bracketed parts with your preferences:
Write for [audience] in a [warm / direct / calm / witty] voice. Use concrete nouns and verbs, short paragraphs, and varied sentence lengths. Lead with the useful point. Explain unfamiliar terms in plain English. Prefer a specific example over a broad claim. Do not invent facts, quotes, sources, or personal experience. Avoid filler openings, inflated praise, repetitive transitions, and lists when a sentence is clearer. Keep punctuation natural; use dashes only when they improve readability. Preserve my meaning, including uncertainty and nuance. If a draft lacks a clear purpose or audience, ask before rewriting. When editing my work, show the revision first and then briefly explain the three most important changes.
The prompt is deliberately a starting point. A rule that bans every dash, every list, or every common word can make writing stiff. Adapt it to the kind of text you publish.
Add it to ChatGPT
On web or desktop, open Settings → Personalization → Custom Instructions, enable customization, and paste your edited version. On mobile, open Settings → Customize ChatGPT. OpenAI says Custom Instructions are available on all plans; Free and Go accounts have a smaller character limit than eligible paid plans. Menu labels may vary by app version.
For a one-off assignment, keep the global instructions short and add the audience, purpose, facts, and sample in that chat. Global rules should express stable preferences, not details of one project.
Prompt C: revise without losing meaning
Revise the draft for [audience] and [purpose] using my writing rules. Keep every verified fact and the original level of certainty. Replace generic claims with concrete details only if the details are present in my notes; otherwise flag the gap. Cut repetition, vary rhythm, and preserve my point of view. Return the revised text, then a short list of factual gaps I should check. Do not add invented anecdotes or testimonials.
A five-minute human edit
Read the result aloud. Circle any line you would never say. Check that the opening gets to the point, every claim has support, and the ending gives the reader a useful next step. Add one detail only you know: a real example, observation, tradeoff, or decision you made. Remove anything that sounds impressive but says little. If this is important writing, have a real person read it before publishing.
Sources & further reading
- OpenAI: ChatGPT Custom Instructions - availability, setup, and character limits.
- OpenAI: Characteristics in ChatGPT - additional style controls where available.
Original guide. The prompts improve your editing workflow; they do not prove authorship or guarantee that text will be perceived as human.
Product details researched in October 2026. Follow the source links for current availability and settings.