AI Content Detector | GPT-5, Claude, Gemini Detection (original) (raw)

Recently, advanced models such as OpenAI's GPT-5, Anthropic's Claude 4.5, Google's Gemini 2.5, Qwen3, DeepSeek-V3, and other state-of-the-art AI systems have led to the rise of sophisticated machine-generated content, sometimes referred to as "AI slop." This synthetic content is increasingly indistinguishable from human-written content, leading to the frequent thought: "Was this written by AI?".

Despite rapid progress, these models continue to have shortcomings such as hallucinated facts as well as consequences such as enabling cheating in language courses. Low-quality AI-generated content, or slop, can be particularly problematic when it floods search results, social media, and other platforms.

This AI checker and slop detector tool provides a way of screening whether a piece of content is written by a human or a machine, helping resolve the "Is this AI-generated?" question and identify AI slop.

Sapling's detector can have false positives. The shorter the text is, the more general it is, and the more essay-like it is, the more likely it is to result in a false positive. We are working on improving the system so that this occurs less frequently.

The free version is currently truncated to 2000 characters (roughly 400 to 500 tokens). Pro and Enterprise Sapling subscribers can paste texts of up to 100,000 characters (roughly 20,000 to 25,000 tokens). For texts longer than that, please break up the text into multiple sections, or consider using our API. If you plan to process more than 5 million characters/month, contact us to see how we can better support your use case.

While language models are evolving and have their differences, they usually use a similar machine learning architecture and a similar dataset on which they're trained. Hence, even AI detectors trained on different and earlier versions of language model outputs should perform significantly better than random on other models.

That said, to get the best performance, detectors should be trained on the outputs of the latest systems. Sapling regularly retrains and finetunes its detector to keep it up-to-date with cutting-edge AI models including GPT-5, Claude 4.5, Gemini 2.5, Qwen3, DeepSeek-V3, and other emerging systems, while maintaining compatibility with older models.

"AI slop" refers to low-quality, generic, and/or repetitive content mass-produced by AI language models. It often appears in sites with user-generated content such as product reviews, social media posts, and articles. Slop is characterized by bland phrasing, filler text, and a lack of genuine insight or originality.