OpenAI updates the default model for free users to GPT-5.6 Luna, adds unlimited text chats for free users, rolls out an improved GPT-5.6 Sol version, and more (Herb Scribner/Axios)

<a href="https://www.axios.com/2026/08/06/openai-chatgpt-upgrades-luna-free-paid"><img align="RIGHT" border="0" hspace="4" src="http://www.techmeme.com/260806/i35.jpg" vspace="4" /></a> <p><a href="https://www.techmeme.com/260806/p35#a260806p35" title="Techmeme permalink"><img height="12" src="http://www.techmeme.com/img/pml.png" style="border: none; padding: 0; margin: 0;" width="11" /></a> Herb Scribner / <a href="https://www.axios.com/">Axios</a>:<br /> <span style="font-size: 1.3em;"><b><a href="https://www.axios.com/2026/08/06/openai-chatgpt-upgrades-luna-free-paid">OpenAI updates the default model for free users to GPT-5.6 Luna, adds unlimited text chats for free users, rolls out an improved GPT-5.6 Sol version, and more</a></b></span>&nbsp; &mdash;&nbsp; OpenAI on Thursday announced a series of changes that will upgrade ChatGPT for both paid and free users.</p>