ChatGPT免费版默认模型升级为GPT-5.6 Luna 取消聊天限额
OpenAI升级ChatGPT免费版：默认模型换成GPT-5.6 Luna且不限量，并优化Chat版Sol，让免费用户获得更高质量的回答。
OpenAI将ChatGPT免费版默认模型升级为GPT-5.6 Luna，彻底取消聊天限额；同时优化了Chat中GPT-5.6 Sol的回答，使其更聚焦、能根据问题调整详细程度，事实错误率较旧版下降约68%。该更新仅限Chat体验，不涉及Work和Codex。
正文摘录
- title: Just now, ChatGPT's free tier gets an epic upgrade! GPT-5.6 can now be used unlimitedly for free - sourcecompany: QbitAI - bodymarkdown: Just now, ChatGPT free users have received an epic upgrade — the default model has now been switched to 5.6 Luna. In chat, 5.6 Sol has received a round of specialization upgrades, with the official announcement stating notable improvements in both factual accuracy and response quality. However, this GPT-5.6 Sol update only applies to the chat experience within ChatGPT. The GPT-5.6 Sol versions used in Work and Codex are not included in this update. OpenAI stated that 1 billion people use ChatGPT every week for quick Q&A, web search, planning, research, consulting, and complex decision-making. The updated GPT-5.6 Sol gives more focused responses, …