GPTs in ChatGPT Learn what GPTs are in ChatGPT, what they can include, who can use and build them, and how they interact with privacy, workspaces, and the GPT Store. Guides for workspace setup, security, and day-to-day use in ChatGPT Enterprise and Edu. Learn more about Codex, our AI coding agent that helps you write, review, and ship code faster. Information regarding our open-weight models, gpt-oss. Learn more about open source products and models from OpenAI. Details on data privacy and usage policies. GPT-5 is a multimodal large language model developed by OpenAI and the fifth in its series of generative pre-trained transformer (GPT) foundation models. Preceded in the series by GPT-4, it was launched on August 7, 2025. Log in or sign up to ChatGPT OpenAI launched GPT-5.6 with three models — Sol, Terra, and Luna. What each one does, what it costs, how to get it, and why the benchmarks need a caveat. GPT-4 is more creative and collaborative than ever before. It can generate, edit, and iterate with users on creative and technical writing tasks, such as composing songs, writing screenplays, or learning a user’s writing style. ChatGPT has evolved substantially since then. 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. Use ChatGPT to answer questions, write, create images, complete work, and code—all in one place. Get started for free or download the app. GPT-4o ( o for omni ) is a multilingual, multimodal generative pre-trained transformer developed by OpenAI and released in May 2024 as part of its GPT series of models. [1] It can process and generate text, images and audio. [2][3] Upon release, GPT-4o was free in ChatGPT, though paid subscribers had higher usage limits. [4] Run projects in parallel, work with files, use your computer, and keep long-running work moving from one desktop workspace. I’ll update the hero copy to clearly communicate what the ChatGPT app does, add outcome-focused bullets, and ensure the CTAs align with launch goals.