GPT‑5 produces higher-quality responses by using your company’s files and connected apps like Google Drive, SharePoint, and more, while respecting existing permissions.

Aug 7, 2025 · 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 question; …

When you select GPT-5 in ChatGPT, you’re using a system that can automatically decide whether to use its Chat or Thinking mode for your request. For complex tasks, GPT-5 switches to GPT …

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 …

Feb 27, 2025 · We’re releasing a research preview of GPT‑4.5—our largest and best model for chat yet. GPT‑4.5 is a step forward in scaling up pre-training and post-training.

Learn about how to use and migrate to GPT-5, the latest model in the OpenAI API.

Aug 7, 2025 · GPT‑5 is available now in the API platform in three sizes: gpt-5, gpt-5-mini, and gpt-5-nano. It’s available on the Responses API, Chat Completions API, and is the default in …

Aug 7, 2025 · GPT-5 is our flagship model for coding, reasoning, and agentic tasks across domains. Learn more in our GPT-5 usage guide.

GPT-5 Chat points to the GPT-5 snapshot currently used in ChatGPT. We recommend GPT-5 for most API usage, but feel free to use this GPT-5 Chat model to test our latest improvements for …

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 …