OpenAI宣布为所有ChatGPT用户取消文本聊天的使用限制。[1]免费和Go用户将默认使用新推出的GPT-5.6 Luna模型，而Plus和Pro用户则获得升级的GPT-5.6 Sol模型。[1]两类用户都将新增"Think"按钮功能以处理复杂问题，其中Plus和Pro用户可自主调整思考强度。[1]
在模型性能方面，GPT-5.6 Luna相比GPT-5.5-Instant的事实性错误减少了62%，而GPT-5.6 Sol的改进幅度更大，错误减少达68%。[1]OpenAI表示，文件、图像、语音和图像生成功能仍将保留各自的单独限制。[1]此次更新将在本周和下周逐步推出。[1]
OpenAI has announced the removal of text chat restrictions across ChatGPT, making unlimited messaging available to all users [1]. Free and Go tier subscribers will now use the new GPT-5.6 Luna model as their default, while Plus and Pro users will gain access to the enhanced GPT-5.6 Sol model [1]. Both user categories will receive a new "Think" button designed to handle complex problems, with Plus and Pro subscribers able to adjust the thinking intensity [1].
The rollout reflects OpenAI's ongoing effort to expand access to its flagship product, which recently reached 1 billion weekly active users [1]. The new Luna and Sol models represent a significant improvement in accuracy compared to the earlier GPT-5.5-Instant, with Luna reducing factual errors by 62 percent and Sol by 68 percent [1]. While text chat limitations are being lifted, the company has clarified that separate restrictions will remain in place for file uploads, image uploads, voice interactions, and image generation [1]. The update will be deployed incrementally over the current and following weeks [1].