ChatGPT — Release Notes: December 19, 2025
OpenAI added fine-grained style controls so you can tune warmth, enthusiasm, structure, and emoji use. This lets teams standardize ChatGPT’s voice across docs, support, and training material. ([help.openai.com](https://help.openai.com/en/articles/6825453-chatgpt-release-notes?utm_source=openai))
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