OpenAI has announced improvements to GPT-5.6 Sol in ChatGPT, delivering better accuracy and consistency, according to the company. The update represents the latest enhancement to OpenAI’s model lineup.
According to OpenAI, the company is also expanding access to GPT-5.6 Luna for free users. Free tier users will now receive unlimited everyday chats with GPT-5.6 Luna, broadening the availability of OpenAI’s advanced language models beyond paying subscribers. The move makes more powerful AI capabilities accessible to a wider user base without requiring a paid subscription.
The dual announcement focuses on both improving existing premium features through the enhanced Sol model and democratizing access through expanded Luna availability. OpenAI did not provide specific technical details about the improvements to GPT-5.6 Sol’s accuracy and consistency metrics in the announcement.