OpenAI爲ChatGPT推送重大更新：免費用戶默認模型升級爲GPT-5.6Luna，文本對話不再受限，可無限使用，本週內全面推送。付費用戶迎來GPT-5.6Sol專精優化，事實準確性與回答質量顯著提升。奧爾特曼發文稱免費用戶無限聊天，Sol表現大幅進步。
OpenAI取消ChatGPT全部文本限制，周活用戶超10億。升級至GPT-5.6系列，免費版默認模型爲GPT-5.6Luna，取代GPT-5.5，並新增“思考”按鈕，供用戶主動開啓高推理模式處理複雜問題。
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