If you’ve ever had AI drift your work, you’ll feel the difference in minutes.
Start 3-Day FreeNo credit card. Full access. 3 days.
Why OpusDraft exists.
OpusDraft started with a working writer’s frustration. Existing AI tools could generate paragraphs, but couldn’t be trusted with the work that mattered — the novel three books deep into a series, the sermon that had to land on Sunday, the keynote that had to match last year’s deck, the academic paper that had to cite real sources. Every AI tool, asked to help with that work, eventually drifted. Characters changed names. Magic systems contradicted themselves. Scripture got invented. Citations appeared that no library could verify.
The fix wasn’t a better prompt. The fix was a different system underneath — one where the AI couldn’t drift even if it wanted to, because canon, rules, voice, and verification were structural, not aspirational. OpusDraft is that system, productized.
Two Paths
Most AI writing tools are built around a different assumption than OpusDraft. The choices show up in what each one is designed to maximize.
Most AI writing tools
optimize for
- Output speed
- Novelty
- Ideation
- Generation volume
- Improvisation
OpusDraft
optimizes for
- Compliance
- Consistency
- Memory
- Structure
- Restraint
One approach improvises. The other follows the work.
It’s a system, not a checklist.
A writing tool can announce that it has canon. Another can claim verification. A third can advertise version history. The features look the same on a comparison chart.
What’s harder to see — and harder to copy — is the way they have to interlock to actually work.
Canon without verification is just notes the AI can ignore. Verification without refusal is a cleanup pass that ships inconsistent prose anyway. Refusal without inheritance breaks the moment you start the second book in your series. Inheritance without version history loses the audit trail of who decided what when. Version history without visible enforcement is just disk space.
Each piece, alone, is easy to add. The seven pieces, tuned to agree with each other on what “your work” means — that’s the engineering that took months. That’s the part that doesn’t ship with a Notion update.
OpusDraft was architected as a system from the start. The seven layers below aren’t a feature list. They’re the parts of a single trust layer that follows your manuscript through every edit, every chapter, every book.
What makes OpusDraft different.
Seven behavior guarantees, each delivered by specific product behavior you can see at every interaction. They are easier to read than to engineer — which is what makes them a moat, not a marketing line.
Your locked facts stay locked.
Canon enforcement is hard refusal, not optional context. Add a character’s mother’s death in Book 1, and the AI cannot generate prose that brings her back in Book 3 without your explicit consent. Names stay names. Magic systems stay coherent. Place names stay spelled the way you spelled them.
Output is checked before you see it.
Every AI output runs through verify-on-fail before delivery. If the prose violates your rules, OpusDraft tells you that honestly, with alternatives — instead of silently shipping inconsistent prose and asking you to police it after the fact. Most AI tools verify after, if at all. OpusDraft verifies first.
Won’t invent what shouldn’t be invented.
The anti-fabrication pack refuses to invent scripture references, academic citations, statistics, or proper names. Auto-enabled on Presentation mode, where invented quotes are most costly. Other AI tools have no refusal layer — they invent confidently when they don’t know. OpusDraft says it doesn’t know.
The AI knows when to stay out of the way.
When your prose is already at the right level, OpusDraft returns “No changes needed” — with a working-editor explanation of why it didn’t touch the passage. Most AI tools are designed to maximize “the AI did something,” which produces over-editing. OpusDraft’s Improve tool reads like an editor who respects the manuscript on the page.
Your decisions travel across every book.
Series mode lets canon, rule packs, and voice live one level up — at the series, not just the book. Every book in the arc inherits them automatically, with per-book toggles for the cases where books legitimately diverge. The AI working on Book 3 sees what you locked in for Book 1. No re-entry required.
Every AI edit is recoverable.
Version history snapshots before every AI Apply — labeled with which tool fired and which intent. Side-by-side diff view shows exactly what the AI changed. One-click restore is itself reversible (the system snapshots before restoring). Word and Google Docs have version history; only OpusDraft pairs it with AI awareness.
Enforcement you can see, not faith you have to take.
Apply / Discard panels for every AI edit. Drift indicators when book-level canon overrides series-level. Refusal banners when verification fails. Named “Sent for review” version stamps when you export to a beta reader. Cmd+K search across every chapter, canon entry, and version label so you can find anything in your own work in under a second. The trust layer is visible at every interaction — not promised in marketing.
Books. Sermons. Keynotes. Pitches.
OpusDraft started as a tool for novelists. The people who kept asking for it turned out to be broader: pastors preparing weekly sermons, founders rehearsing investor pitches, keynote speakers with a recurring talk, consultants delivering workshops, teachers drafting lessons.
The common thread: long-form work where every detail has to hold, the structure has to carry, and the voice has to stay yours from start to finish.
So we built a second mode for it. One engine, two modes — Books for manuscripts, Presentations for anything you stand up and deliver. Novels see “Canon.” Sermons see “Facts.” Same enforcement. Right language.
Bring Your Own Key
Every paid tier is BYOK. You bring your own Anthropic API key — we don't touch your usage, we don't bill for AI, and we never raise your AI prices. New OpusSmith users get a 3-day trial on our key first; after that, BYOK across the board.
OpusDraft charges for the platform, the enforcement layer, the editor, and the export pipeline. You pay Anthropic directly for AI usage — typically $2–10/month for a steady writer. Costs stay transparent. Your data stays yours. We don't train on it, we don't keep it, we don't sell it.
What OpusDraft Is Not
OpusDraft is not a one-click novel writer. It will not generate a book while you sleep. It will not turn a three-sentence prompt into a finished sermon. We don't believe in that product, and we're not building it.
OpusDraft is for people who want to write their own work — and want AI doing what it's actually good at: drafting, tightening, polishing, catching breaks. You keep the voice, the vision, and every final call. It's a tool for finishing, not a shortcut around the craft.
No prompts. No reminders. No babysitting the AI. It just follows your rules — and checks itself before it answers.
Three days, no credit card, full access to the trust layer. opusdraft.com