Custom AI writing models
AI that writes
like you
A model trained on your actual writing — not a tone selector, not a style prompt — so every piece of content carries your voice. At any scale.
Brand voice tools don't train. They pretend.
Every AI writing tool claims to learn your voice. They analyze a few samples, build a prompt, and hope for the best. The result drifts after two paragraphs and reads like everything else on the internet.
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Prompt engineering fades
System prompts lose influence as context grows. By paragraph three, your "brand voice" is gone.
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One model fits nobody
Jasper, Copy.ai, and Writer use the same base model for every client. Your voice is a costume, not a characteristic.
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Detection is the new gatekeep
AI detectors flag generic patterns. Post-hoc "humanizers" introduce errors. Neither solves the root problem.
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Writers don't scale
Freelancers cost $8–15K/month per voice. Onboarding takes weeks. They leave, and the voice leaves with them.
How it works
Your writing becomes the model
We don't prompt-engineer your voice. We fine-tune a dedicated language model on your actual writing — vocabulary, rhythm, structure, instinct — so the output isn't an imitation. It's an extension.
Upload your writing
Upload 50+ writing samples — blog posts, newsletters, articles, emails. Anything that sounds like you. The system validates quality and flags gaps automatically before training begins.
Your model trains
A dedicated model is fine-tuned on your writing. Not approximated through prompting — the model's parameters change to learn your patterns directly from your prose.
Validation & scoring
Every model is tested against AI detectors, scored for voice consistency, and validated against your original corpus before delivery.
Write at scale
Submit briefs through your dashboard. Receive content in your voice within minutes, not days. Every piece you edit makes the model sharper — it learns what you keep and what you change.
The difference between a voice prompt and a trained model is the difference between an impression and a fingerprint.
The difference
Trained models,
not engineered prompts
Every other tool wraps the same model in a different instruction set. Ghostweight changes the model itself.
For people who write
for a living — or should
Ghostweight is for anyone whose reputation rides on how they write — whether that's a team producing content for clients, or a founder whose voice is the brand.
Content agencies
Managing 5–20 client voices with rotating freelancers. Every new writer means weeks of onboarding. Every departure means starting over. Ghostweight is a voice that never leaves.
Founders & executives
You know you should be on LinkedIn, writing newsletters, publishing thought leadership. You don't have the hours. A model trained on your actual writing produces drafts that sound like you sat down and wrote them.
Brand content teams
Three writers, five markets, one voice that keeps fracturing at scale. The trained model becomes the style guide — new contributors write on-brand from day one, without a six-week ramp.
Pricing
Train once. Write forever.
A one-time training fee to build your voice model, then a monthly plan based on how much you write.
1 trained voice
Dashboard access
1 trained voice
Priority queue + API
Up to 5 voices
Dedicated support
Try before you train
Get a free voice analysis
See your writing fingerprint
Upload a few writing samples and we'll map your voice — sentence rhythm, vocabulary patterns, structural habits, and tonal range. No model training, no commitment.
Upload 5–10 samples
Automated voice analysis
Your writing fingerprint
Free. No commitment. Your writing stays private.
Questions
Before you ask
Jasper analyzes your samples and builds a text instruction. The same base model serves every client. Ghostweight trains a dedicated model — a permanent change to the AI's internal parameters — on your writing. Jasper's voice fades as the text grows. A trained model doesn't drift, because your voice isn't an instruction. It's the model.
A minimum of 50 samples, roughly 50,000+ words. Blog posts, newsletters, articles, emails — anything that represents how you want to sound. More data produces sharper results. Our system validates your corpus automatically and flags any gaps before training begins.
Yes. Every generation runs through our anti-pattern scoring system, which flags and regenerates any text with detectable AI patterns. Because the model is trained on human writing — yours — the output is structurally different from generic AI text.
Every edit you make to generated content becomes a training signal. We compare your corrections against the original output and periodically retrain the model on those preferences. It learns what you keep and what you change — so every quarter, the model gets closer to how you'd write it yourself.
Your corpus is processed and stored exclusively on our private infrastructure. It is never sent to third-party AI providers, cloud APIs, or shared with other clients. Your trained model serves only your account. If you cancel, all data and the model are permanently deleted.
A piece is any content unit up to 2,500 words — a blog post, a newsletter, a LinkedIn article, a white paper section. Short-form content like social posts or email subject lines counts as a fraction of a piece.
Your writing corpus remains yours. The trained model runs exclusively on our infrastructure and serves only your account. We don't use your data to improve other clients' models or any general-purpose system.
Yes — professional emails, client communications, and internal memos can be excellent training data because they capture your unfiltered voice. We process all materials through automated pipelines. No human reads your content. Sensitive information is stripped automatically before training.
Your voice deserves
more than a prompt
Start with a free voice analysis. Submit a handful of writing samples and we'll show you exactly how a trained model captures what makes your prose yours.
Get started