NotGPTAI Text & Image Detector

NotGPT benchmarks against mainstream AI models including GPT-4, Claude, Gemini, and Llama using public datasets. Our detection analyzes linguistic patterns such as perplexity and burstiness to estimate AI-likeness. Accuracy depends on text length and domain — longer passages (200+ words) yield more reliable results. No AI detector achieves 100% certainty, which is why NotGPT provides probability scores rather than binary verdicts.

Yes. NotGPT follows a strict privacy-first approach: submitted text and images are not stored on servers after analysis. Only anonymized history summaries may be kept locally on your device for your convenience. NotGPT does not perform biometric identification or share data with third parties. See our Privacy Policy for full details.

Humanize is NotGPT’s built-in rewriting tool that transforms AI-generated text to sound more natural and authentic. It offers three intensity levels — Light, Medium, and Strong — so you can choose how much to rewrite while preserving your original intent and tone. This helps reduce AI-likeness scores from typical 60–80% down to under 20% in most cases.

NotGPT detects content generated by all major large language models (LLMs), including OpenAI’s GPT-3.5 and GPT-4, Anthropic’s Claude, Google’s Gemini, Meta’s Llama, and other transformer-based models. Detection works by analyzing linguistic patterns common to AI-generated text rather than targeting specific models, which means NotGPT remains effective as new models are released.

NotGPT offers a free plan that includes 2 detections per day for both text and images. For unlimited detections, humanize rewrites, full history access, and priority support, paid plans start at $4.99 per week, $9.99 per month, or $79.99 per year. The app is available on both iOS and Android.

NotGPT supports AI text detection in 12 languages: English, French, Spanish, Portuguese, Dutch, German, Polish, Italian, Romanian, Indonesian, Tagalog, and Chinese (Simplified). Language coverage is continuously expanding. Image detection is language-agnostic and works universally regardless of language.

NotGPT’s AI image detection analyzes visual artifacts commonly found in AI-generated images, including edge inconsistencies, unnatural textures, composition anomalies, and pixel-level patterns. The system returns a probability score alongside visual cues highlighting areas that appear machine-generated. This helps identify images created by tools like DALL-E, Midjourney, and Stable Diffusion.