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  1. Introducing ChatGPT - OpenAI

    Nov 30, 2022 · 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, …

  2. OpenAI

    We believe our research will eventually lead to artificial general intelligence, a system that can solve human-level problems. Building safe and beneficial AGI is our mission.

  3. GPT-5 is here - OpenAI

    Try it in ChatGPT Read the research 00:00 ChatGPT For developers For business ChatGPT powered by GPT-5 Expert intelligence for everyone GPT‑5 is smarter across the board, providing more useful …

  4. Start using ChatGPT instantly - OpenAI

    Jan 31, 2024 · It's core to our mission to make tools like ChatGPT broadly available so that people can experience the benefits of AI. More than 100 million people across 185 countries use ChatGPT …

  5. GPT-4 | OpenAI

    Mar 14, 2023 · 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 …

  6. Introducing GPT-5 - OpenAI

    Aug 7, 2025 · How to use GPT‑5 GPT‑5 is the new default in ChatGPT, replacing GPT‑4o, OpenAI o3, OpenAI o4-mini, GPT‑4.1, and GPT‑4.5 for signed-in users. Just open ChatGPT and type your …

  7. Introducing GPT-4o and more tools to ChatGPT free users

    May 13, 2024 · In line with our mission, we are focused on advancing AI technology and ensuring it is accessible and beneficial to everyone. Today we are introducing our newest model, GPT‑4o, and will …

  8. GPT-5.1: A smarter, more conversational ChatGPT - OpenAI

    Nov 12, 2025 · GPT‑5.1 Instant: our most-used model, now warmer, more intelligent, and better at following your instructions. GPT‑5.1 Thinking: our advanced reasoning model, now easier to …

  9. Writing with AI - OpenAI

    Writers are using ChatGPT as a sounding board, story consultant, research assistant, and editor—to talk out ideas, find the right word, clarify their thinking, and get feedback on structure and flow.

  10. Introducing ChatGPT agent: bridging research and action

    Jul 17, 2025 · On Humanity’s Last Exam ⁠ *, an evaluation that measures AI’s performance across a broad range of subjects on expert-level questions, the model powering ChatGPT agent scores a new …