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  1. ChatGPT | OpenAI

    Access to a research preview of GPT‑4.5, our largest model yet, and GPT‑4.1, a model optimized for coding tasks Create and use projects, tasks, and custom GPTs

  2. Introducing ChatGPT - OpenAI

    Nov 30, 2022 · Today’s research release of ChatGPT is the latest step in OpenAI’s iterative deployment ⁠ of increasingly safe and useful AI systems. Many lessons from deployment of …

  3. 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 …

  4. GPT-4 | OpenAI

    Mar 14, 2023 · GPT-4 is capable of handling over 25,000 words of text, allowing for use cases like long form content creation, extended conversations, and document search and analysis.

  5. ChatGPT can now see, hear, and speak - OpenAI

    Sep 25, 2023 · Chat about images You can now show ChatGPT one or more images. Troubleshoot why your grill won’t start, explore the contents of your fridge to plan a meal, or …

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

    May 13, 2024 · To make advanced AI more accessible and useful worldwide, GPT‑4o's language capabilities are improved across quality and speed. ChatGPT also now supports more than 50 …

  7. Introducing ChatGPT agent: bridging research and action - OpenAI

    5 days ago · It can now actively engage websites—clicking, filtering, and gathering more precise, efficient results. You can also naturally transition from a simple conversation to requesting …

  8. Introducing GPT-4.5 - OpenAI

    Feb 27, 2025 · We’re also previewing GPT‑4.5 in the Chat Completions API, Assistants API, and Batch API to developers on all paid usage tiers ⁠. The model supports key features like function …

  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. Download ChatGPT - OpenAI

    ChatGPT Download ChatGPT For Mobile Chat on the go, have voice conversations, and ask about photos. Download for iOS ⁠ Download for Android ⁠