OpenAI为ChatGPT推送重大更新：免费用户默认模型升级为GPT-5.6Luna，文本对话不再受限，可无限使用，本周内全面推送。付费用户迎来GPT-5.6Sol专精优化，事实准确性与回答质量显著提升。奥尔特曼发文称免费用户无限聊天，Sol表现大幅进步。
OpenAI取消ChatGPT全部文本限制，周活用户超10亿。升级至GPT-5.6系列，免费版默认模型为GPT-5.6Luna，取代GPT-5.5，并新增“思考”按钮，供用户主动开启高推理模式处理复杂问题。
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