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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. 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. For the latest Chat model, please refer to our models page. We recommend GPT-5.1 for most API usage, but feel free to use this GPT-5.1 Chat model to test our latest improvements for chat use cases. We spent 6 months making GPT‑4 safer and more aligned. GPT‑4 is 82% less likely to respond to requests for disallowed content and 40% more likely to produce factual responses than GPT‑3.5 on. Dec 11, 2025 · Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for GPT-5.2.