<p id="speakable-summary" class="wp-block-paragraph">OpenAI is removing limits on text-based chats for all users on ChatGPT, which recently crossed the <a href="https://openai.com/index/building-abundant-intelligence/" target="_blank" rel="noreferrer noopener nofollow">1 billion weekly user mark</a>, the company <a href="https://openai.com/index/improving-gpt-5-6-sol-in-chatgpt/" target="_blank" rel="noreferrer noopener nofollow">announced</a> today.</p>
<p class="wp-block-paragraph">The new GPT-5.6 Luna model will power this experience and will be the default model for Free and Go users, replacing GPT-5.5.</p>
<p class="wp-block-paragraph">Both users will also get a new “Think” button that lets them select higher reasoning power for complex questions. OpenAI said that there will still be separate limits for files, images, voice, and image generation.</p>
<img loading="lazy" decoding="async" height="383" width="680" src="https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?w=680" alt="" class="wp-image-3150786" srcset="https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg 1920w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=150,84 150w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=300,169 300w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=768,432 768w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=680,383 680w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=1200,675 1200w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=1280,720 1280w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=430,242 430w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=720,405 720w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=900,506 900w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=800,450 800w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=1536,864 1536w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=668,375 668w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=1097,617 1097w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=708,398 708w, https://techcrunch.com/wp-content/uploads/2026/08/New-Free-Think-Button.jpeg?resize=50,28 50w" sizes="auto, (max-width: 680px) 100vw, 680px"><strong>Image Credits:</strong>OpenAI <p class="wp-block-paragraph">The update brings changes for Plus and Pro users as well. They’ll gain access to an upgraded GPT-5.6 Sol model that’s better for quick tasks such as questions, web research, advice, planning, writing, and making decisions. The company noted that this new model will give more compact and robust answers. (Notably, this is a separate version from GPT-5.6 Sol used for Codex and Work, which is unchanged.)</p>
<p class="wp-block-paragraph">ChatGPT Plus and Pro users are also getting a thinking slider to adjust “how much” thought the model puts into an answer. They can tune the thinking slider based on complexity and steps involved in solving a query.</p>
<img loading="lazy" decoding="async" height="680" width="680" src="https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?w=680" alt="" class="wp-image-3150785" srcset="https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg 1080w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=150,150 150w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=300,300 300w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=768,768 768w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=680,680 680w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=430,430 430w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=720,720 720w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=900,900 900w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=800,800 800w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=668,668 668w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=375,375 375w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=617,617 617w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=531,531 531w, https://techcrunch.com/wp-content/uploads/2026/08/New-Plus-_-Pro-Slider-Image.jpeg?resize=50,50 50w" sizes="auto, (max-width: 680px) 100vw, 680px"><strong>Image Credits:</strong>OpenAI <p class="wp-block-paragraph">OpenAI said an internal evaluation found that, compared to GPT-5.5-Instant, factual errors were 62% less common for GPT-5.6 Luna and 68% less common for GPT-5.6 Sol. </p>
<p class="wp-block-paragraph">The updated version of GPT-5.6 Sol is available to Plus and Pro users today, while the other changes for Free and Go users are arriving this week. Next week, users will gain access to unlimited text chats and the new Think button for harder questions.</p>
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