Open links in new tab
  1. Introducing ChatGPT - OpenAI

    Nov 30, 2022 · We performed several iterations of this process. ChatGPT is fine-tuned from a model in the GPT‑3.5 series, which finished training in early 2022. You can learn more about …

  2. 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 …

  3. ChatGPT | OpenAI Help Center

    How is data retained in the macOS app? Learn how chats, files, and custom GPT data are stored and deleted in the ChatGPT macOS app.

  4. Data analysis with ChatGPT - OpenAI Help Center

    After uploading a file, ChatGPT can determine the ideal chart type for the dataset, or you can specify one of our supported chart types in your prompt. You can customize the graphics of …

  5. OpenAI

    Our Research Research Index Research Overview Research Residency OpenAI for Science Latest Advancements GPT-5 Codex OpenAI o3 OpenAI o4-mini GPT-4o GPT-4o mini Sora …

  6. GPT-4 - OpenAI

    Mar 14, 2023 · GPT-4 is a large multimodal model (accepting image and text inputs, emitting text outputs) that, while less capable than humans in many real-world scenarios, exhibits human …

  7. Introducing GPT-5.2 - OpenAI

    Dec 11, 2025 · GPT-5.2 is our most advanced frontier model for everyday professional work, with state-of-the-art reasoning, long-context understanding, coding, and vision. Use it in ChatGPT …

  8. GPT-5 is here - OpenAI

    GPT‑5 excels at writing, research, analysis, coding, and problem-solving. It delivers more accurate, professional responses and feels like collaborating with a smart, thoughtful colleague.

  9. What is ChatGPT? - OpenAI Help Center

    ChatGPT is fine-tuned from GPT-3.5, a language model trained to produce text. ChatGPT was optimized for dialogue by using Reinforcement Learning with Human Feedback (RLHF) – a …

  10. Introducing ChatGPT search | OpenAI

    Oct 31, 2024 · The search model is a fine-tuned version of GPT‑4o, post-trained using novel synthetic data generation techniques, including distilling outputs from OpenAI o1‑preview.