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  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 the 3.5 series …

  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 ChatGPT …

  3. GPT-4 | OpenAI

    Mar 14, 2023 · 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 …

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

    Sep 25, 2023 · Image understanding is powered by multimodal GPT‑3.5 and GPT‑4. These models apply their language reasoning skills to a wide range of images, such as photographs, screenshots, …

  5. 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 method …

  6. OpenAI

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

  7. Introducing ChatGPT Plus - OpenAI

    Feb 1, 2023 · We’re launching a pilot subscription plan for ChatGPT, a conversational AI that can chat with you, answer follow-up questions, and challenge incorrect assumptions.

  8. 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.

  9. Hello GPT-4o - OpenAI

    May 13, 2024 · It matches GPT‑4 Turbo performance on text in English and code, with significant improvement on text in non-English languages, while also being much faster and 50% cheaper in the …

  10. Presentamos ChatGPT - OpenAI

    Optimizamos ChatGPT a partir de un modelo de la serie GPT‑3.5, cuyo entrenamiento terminó a principios de 2022. Encontrarás más información sobre la serie 3.5 aquí ⁠.