ZeroGPT is a comprehensive AI detection and writing platform built around its proprietary DeepAnalyse multi-stage detection methodology. Its core function analyzes text at the document, paragraph, and sentence level, individually highlighting AI-written sentences and providing a percentage confidence score. ZeroGPT detects content generated by all major AI models: ChatGPT (GPT-3, GPT-4, GPT-5), Google Gemini, xAI Grok, Anthropic Claude, Meta LLaMA, DeepSeek, Perplexity AI, Microsoft Copilot, and others. It supports all languages with consistent detection accuracy. Beyond detection, ZeroGPT has evolved into a full writing and integrity toolkit. Its AI Humanizer rewrites AI-generated content into natural, human-sounding prose. The Plagiarism Checker cross-references billions of web and academic sources. The AI Image Detector identifies deepfakes and AI-generated images. Additional tools include a Paraphraser, Summarizer, Grammar Checker, Translator, Citation Generator, Word Counter, Background Remover, and ZeroCHAT-4/5 chatbots. ZeroGPT integrates with WhatsApp and Telegram, supports batch file uploads for processing multiple documents simultaneously, and generates PDF detection reports as proof of content authenticity. Businesses and institutions use the REST API to integrate AI detection directly into their own platforms. Trusted by educators, publishers, content teams, and enterprises worldwide, ZeroGPT is the most thorough solution for maintaining content authenticity in the age of generative AI.