Winston

Powerful AI content detection solution for education and publishing. Winston AI is the industry leading AI content detector and plagiarism checker for ChatGPT, Claude, Google Gemini and more. Winston identifies text likely generated by AI models such as ChatGPT, Claude, Google Gemini, Llama, and others, including paraphrased or "humanized" versions using tools like Quillbot. The tool claims a 99.98% accuracy rate for detecting AI-generated content, with strong performance in many 2025 tests, though real-world results vary and no detector reaches perfect reliability. It detects AI content in multiple languages including French, Spanish, Portuguese, German, Dutch, Polish, Italian, Indonesian, Romanian, and Simplified Chinese. It includes an AI image detector for spotting deepfakes or images from tools like Midjourney, DALL-E, Stable Diffusion, and Bing Image Creator. Winston offers a built-in plagiarism checker that scans for duplicated content across languages and helps visualize matches or citations. A Chrome extension lets you check text for AI generation directly on web pages, and installing it grants extra free credits.