The AI detector built for fiction — not essays.
Generic detectors flag real novels as AI. Slopsleuth runs five audits calibrated on published fiction, so literary and minimalist prose isn't punished. Every flag is shown with the passage.
Why a fiction-specific detector
A generic detector scores Hemingway 73% AI.
Perplexity-based tools were trained on essays and web text, so they read clean, minimalist prose as machine-made. Run four public-domain novels through Slopsleuth and they sit where human writing should — 0 out of 100, all four.
How it works
Five audits, tuned for prose.
No black-box percentage. Each audit measures a specific pattern documented in current AI fiction, calibrated against published human novels — and every flag quotes the passage it came from.
Not-X Fragments
Hedge fragments like “Not because he was brave. Because his legs wouldn’t move.” — the most common AI tell in modern fiction.
Body-Part Clusters
When chest, jaw, or throat get hammered repeatedly within 10 paragraphs. AI reaches for physical anchors humans don’t.
Dialogue Texture
Real dialogue is rough — fillers, restarts, mishearings. AI dialogue is unnaturally clean. We measure the absence.
Stock AI-Phrasings
“The way grief lives in objects.” Two constructions show 45–122× separation between AI and human fiction.
Voice Variance
A per-chapter audit that catches hybrid manuscripts — half-human, half-AI — that whole-document averages hide.
Who uses a fiction AI detector
Authors
Audit your own manuscript before you query or submit. Find the AI-prose tics you may have absorbed — even if you wrote every word — without your style being punished.
Literary agents
Triage the slush pile with defensible, transparent audits — every flag explained, every passage shown. No black-box percentage you can't stand behind.
Publishers
Catch hybrid manuscripts before contract. The voice-variance audit detects bimodal, half-AI patterns that whole-manuscript averages mask.
Frequently asked questions
What's the best AI detector for fiction?
For fiction specifically, you want a detector calibrated on novels rather than a general-purpose tool trained mostly on essays and web copy. Slopsleuth was built for exactly this: five audits tuned against published human fiction, with every flag shown alongside the passage it came from. General detectors like GPTZero remain better for high-volume, non-fiction screening.
Why do AI detectors flag my novel as AI?
Most detectors measure perplexity — how predictable the text is. Skilled literary and minimalist prose is predictable by design (short clean sentences, controlled vocabulary, deliberate repetition), so it trips the same wire as AI. That's why writers like Hemingway score as heavily "AI" on perplexity-based tools even though every word is human.
Can I use a regular AI detector on a manuscript?
You can, but expect a high false-positive rate on literary fiction — the more stylized the prose, the more likely a general detector mislabels it. A fiction-calibrated audit that explains each flag is far safer for any decision that affects a real author.
Does Slopsleuth work for any genre?
Yes — the audits measure structural patterns that show up across genres, from literary to thriller to romance. It's strongest on prose fiction (novels, short stories, manuscripts) and is not designed for essays, marketing copy, or academic writing.
Will my human-written manuscript pass?
If you wrote it, it should sit in the human range — all four of our public-domain calibration novels scored 0 out of 100. Slopsleuth shows its work, so if anything is flagged you see the exact passage and can judge for yourself. No score is a verdict; it's a starting point for a closer look.
Test your fiction in 30 seconds.
Run a free sample audit. No signup, no credit card — just the engine built for fiction.
Try Slopsleuth free