88Z AI, 7 August — OpenAI announced that text chats with ChatGPT are no longer restricted for free users, with the default model upgraded to GPT-5.6 Luna, which outperforms GPT-5.5 Instant. Free and Go subscribers can also use a new thinking button for complex problems, but high-compute features like file uploads, image generation, and voice conversations remain limited. Paid users will receive the more reliable and concise GPT-5.6 Sol along with a five-level thinking intensity slider.
At a glance
- Free users' text chat restrictions lifted with default model upgraded to GPT-5.6 Luna
- Paid users receive GPT-5.6 Sol and five-level thinking intensity adjustment

The update
OpenAI has announced that free users will no longer face restrictions when engaging in text conversations with ChatGPT. The default model has been officially upgraded to GPT-5.6 Luna, which offers better performance than the previous GPT-5.5 Instant version. For free users and Go subscribers, a new thinking button has been added to assist with handling more complex logical problems. However, high-compute features such as file uploads, image generation, and voice conversations remain limited. Paid users will gain access to the more reliable and concise GPT-5.6 Sol model, along with a five-level adjustable thinking intensity slider to meet needs in various scenarios.
Sources & editorial note
This article is an AI-assisted synthesis by 88Z AI based on the public sources below. Product claims and availability are attributed to their publishers. It does not represent independent testing or first-hand reporting.
- 财联社Source published
Source dates above refer to the original announcements; the date under the headline is this article’s publication on 88Z AI.