# AI that writes like you · ScriptGrain > Write-like-me prompts drift. A measured voice profile pins your voice down as 45 explicit constraints and enforces them on every generation. See your profile free. Canonical: https://scriptgrain.com/ai-that-writes-like-you # AI that writes like you *By Jack Stovell · published 2026-08-03* You make AI write like you by giving it a measured target instead of a description, and you can give that target to the AI you already use: ScriptGrain makes ChatGPT, Claude and the rest better at being you. Tell a model to "write like me" and it guesses. Hand it a profile built from 45 attributes pulled out of your actual sentences, across lexical choices, sentence syntax, tone and register, rhetorical structure, punctuation and format, function words, content patterns, and quirks and cadence, and it has something specific to aim at. That is what ScriptGrain does. Give it a writing sample, get a measured profile back in about 45 seconds, then generate against that rather than a vague impression. ## Here's the thing about "write like me" prompts You paste in five samples. The model reads them once, nods politely, and drifts by paragraph three. That's not a flaw you can prompt your way out of. It's how the process works: samples get read, not learned. No constraint, no memory, no you. So the output sounds fine. Generic-fine. The kind of fine that gets flagged, skimmed, and forgotten. ## What "measuring a voice" actually means We don't ask a model to imitate you. We measure you, then hold it to that. **1. Sentence rhythm and variance.** Do you write in bursts, short then long, or do you cruise at one length all the way down the page? That's a number, not a vibe. **2. Contraction rate and punctuation habits.** How often "don't" beats "do not". Whether you reach for semicolons or avoid them like a tax form. Fixed, then enforced. **3. Humour register and argument structure.** Dry or warm. Conclusion-first or slow build. Every one of these gets pinned down, alongside function words, tone, and the odd verbal tic you didn't know you had. 45 attributes in total, pulled from a two-pass stylometric analysis. Lexical, syntactic, tonal, rhetorical, punctuation, function words, content patterns, quirks. That's the whole voice, not a sample of it. ## How the profile gets built You give us real writing. Emails, posts, reports, whatever sounds like you when nobody's editing. We run it twice: once for the surface stuff, once for the patterns underneath. Out comes a profile: 45 explicit constraints, not a mood board. That profile is what generation gets locked to. Every time. ## Free to see it. Paid to use it. Seeing your own profile costs nothing. No card, no trial clock ticking down. - **Free**: one voice profile, one full analysis. Just to look. - **Writer, £12/month**: one profile, generate freely. - **Operator, £29/month**: three profiles. - **Studio, £99/month**: ten profiles. - **Agency, £299/month**: unlimited profiles, ten team seats included. Fair enough if you just want to see the numbers first. Most people do. ## The bit where we ask you to try it You've been burned by generic AI output before. That's exactly why the free tier costs you nothing but ten minutes: upload some writing, get your profile, read it, judge for yourself whether it sounds like you. At the end of the day, a voice you don't recognise isn't a voice at all. It's just text. No card required. Analysis included. ## Questions ### How much of my own writing do I need to start? One sample is enough to begin. ScriptGrain flags confidence rather than demanding a minimum, so a single piece gets you a working profile. More evidence firms it up: around 3,000 words across several representative samples gives the analysis a steadier read on your patterns. ### Is a stored profile better than pasting samples into a prompt each time? Pasting samples into a prompt works for a one-off, but the model reads them rather than learning them, so the voice drifts as the piece goes on and you start again next session. A stored profile is measured once, reused indefinitely, and applied as a constraint on every draft, with a score afterwards telling you how closely it held. ### Does it work for a voice that changes over time? Yes. Voices drift, which is why a profile is re-analysable rather than fixed. Add newer samples and re-analyse when your writing shifts, and you get an updated read. The measured attributes stay read-only by design, so the profile always reflects real writing rather than hand-tuning. ### What does it cost to see my own profile? Nothing. The free plan includes one voice profile and the full 45-point analysis, with no card required, plus one free draft to see it applied and API and MCP access. Paid plans start at £12 a month if you want more profiles or more volume.