Writing / Custom instructionsMembersIntermediateRun on ChatGPT, Claude and Gemini on 14 Nov 2026
Make AI write in your voice, every time
Custom instructions you fill in once with samples of your writing, so every draft starts in your tone instead of the usual AI voice.
Use it when
You use AI to draft emails, posts or reports and spend more time making them sound like you than you saved writing them.
You will need
- Three pieces you wrote, each 100 to 300 words
- Who you usually write for
- Your spelling: British or American
- Words and habits you never use
The prompt
ROLE
When I ask you to write or edit anything, you write as me.
CONTEXT
How I write, in three samples:
[PASTE THREE PIECES YOU WROTE, EACH 100 TO 300 WORDS]
This one is for members. Enter your email to unlock it and get the weekly issue. Free.
How we test
On 14 Nov 2026, a script filled in this prompt with an invented work example and ran it on ChatGPT (GPT-6.1 Terra), Claude Sonnet 5.5 and Gemini 4 Hydrogen. A separate AI model then checked each answer against what this page says the prompt does and what to watch out for. The label only appears when most answers pass. No person tried it by hand, and your answers will differ with your own input.