originality.ai is the detector that scares people most. it's aggressive, it's strict, and a lot of clients and editors use it as the final word on whether content is ai-generated.

we test against it constantly. here's the real story.

what originality.ai does

it scans text and gives an ai probability score from 0-100%. anything above 50% is flagged. they also do plagiarism checking. the tool is popular with content agencies, freelance clients, and publishers.

their detection is genuinely good against raw ai output. chatgpt, claude, gemini — originality.ai catches all of them reliably. scores usually come back 95-100%.

they're also aggressive about catching paraphrased content. basic synonym swapping barely dents the score. they've trained their models to see through surface-level changes.

where paraai stands

we don't play the synonym game. paraai's paraphrase uses fine-tuned models trained on actual human-text corpora. the rewriting happens at the structural level — sentence patterns, rhythm, vocabulary distribution all shift to match genuine human writing.

against originality.ai specifically, our paraphrase output consistently scores in the 2-8% range. that's well under their flagging threshold.

this isn't because we reverse-engineered their detector. it's because our models produce text with the statistical properties of human writing. originality.ai is looking for ai patterns. our output doesn't have them.

the strictness factor

originality.ai catches tools that other detectors miss. basic paraphrasers that bring gptzero scores down to 30% still score 60%+ on originality.ai. it's harder to fool.

that's actually good for paraai. the stricter the detector, the more it rewards genuine rewriting over shallow tricks. cheap humanizers fail against originality.ai. paraai's deep rewriting approach works precisely because it produces fundamentally different text, not just shuffled text.

practical advice

if your client uses originality.ai, use it as your quality check too. scan your output before submitting. if it scores under 10%, you're safe.

paraai plus originality.ai is actually a solid workflow. write and rewrite with paraai. verify with originality.ai. submit with confidence. the two tools work well together even though they're on opposite sides.

the confidence game

the real value of scoring low on the strictest detector is confidence. if your text passes originality.ai, it passes everything. gptzero, turnitin, copyleaks — all less strict.

untraceable ai writing means untraceable against the hardest test, not just the easy ones. that's the standard paraai is built to meet.