Stories View all Training to cycle across Antarctica with ChatGPT Jun 11, 2026 Creating new simulations of black holes with Codex Jun 11, 2026 We’ve trained a model called ChatGPT which interacts in a conversational way. The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests. Try ChatGPT Free today and use AI to write, learn, plan, and get quick answers—at no cost. Log in or sign up to ChatGPT Use ChatGPT to answer questions, write, create images, complete work, and code—all in one place. Get started for free or download the app. OpenAI operates the service on a freemium model. Users can interact with ChatGPT through text, audio, and image prompts. ChatGPT was quickly adopted, reaching 100 million monthly active users two months after its release and 900 million weekly active users in February 2026. Download the ChatGPT app for Windows, Mac, iPhone, and Android. Access ChatGPT Work and Codex, use voice conversations, create images, and connect your files and apps. Talk with ChatGPT in real time when speaking is easier than typing. Use voice to brainstorm, practice, learn, or keep moving while you’re away from your keyboard. Use ChatGPT to answer questions, write, create images, complete work, and code—all in one place. Get started for free or download the app. Training with human feedback We incorporated more human feedback, including feedback submitted by ChatGPT users, to improve GPT‑4’s behavior. We also worked with over 50 experts for early feedback in domains including AI safety and security.