As AI writing tools become increasingly sophisticated, web publishers, educators, and editors are desperate for reliable AI detection. We ran a massive statistical analysis on 160 text samples comparing Originality.ai and Sapling.ai. The results were shocking.
The Testing Methodology
To find out which tool actually works, we didn't just test one or two articles. We compiled a robust dataset of 160 text samples—a mix of entirely human-written content and entirely AI-generated content. We ran every single sample through both Originality.ai and Sapling.ai.
Note: The scores presented in our study represent the Probability of Human Writing. A score of 1.0 means the tool is 100% confident a human wrote it, while 0.0 means it is 100% confident it is AI.
Key Statistical Findings:
- On Human-Written Text: Originality.ai scored an average of 89.2% human. Sapling.ai only scored an average of 36.4% human.
- On AI-Generated Text: Originality.ai scored an average of 23.1% human. Sapling.ai scored an average of 9.1% human.
Visualizing the Data: The False Positive Problem
The biggest fear with AI detectors is the false positive—accusing a human writer of using AI when they didn't. Based on our dataset, we generated the following chart to visualize the average human score probabilities assigned by each detector.
Also Read: Can Originality AI Detect Deepseek?
As the chart clearly shows, Sapling.ai suffers from a massive false positive rate. Even when evaluating 100% human-written content, Sapling.ai assumes it is mostly AI (giving it a dismal 36% human score). Originality.ai accurately recognized the human writers, giving them an average score of 89%.
Also Read: Free Ways to Check If the Text is AI Generated?
Deep Dive: Originality.ai in Action
Originality.ai has built a reputation as the industry standard for content publishers. Our data backs this up: it protects human writers by correctly identifying their nuance, tone, and sentence structure.
Deep Dive: Sapling.ai in Action
Sapling.ai is highly aggressive at flagging content. While this means it successfully catches AI (giving AI text an average human score of just 9.1%), it catches entirely too many innocent bystanders in the process. It frequently flags well-structured, grammatical human writing as AI.
The Final Verdict
If you are looking for an AI detector that won't ruin your relationship with your writers (or incorrectly flag your own hard work), Originality.ai is the definitive winner.
Sapling.ai is simply too aggressive. Giving human text a 36.4% human score means that the tool essentially renders human writers guilty until proven innocent. Originality.ai maintains a strong 89.2% accuracy rate on human text while still reliably catching AI.
