OpenAI is rolling out GPT-5.6 Luna to Free ChatGPT users
OpenAI is expanding GPT-5.6 access in ChatGPT, bringing Luna to free users and Sol to paid tiers with reasoning controls.
Excerpt
OpenAI updates ChatGPT with GPT-5.6 Sol for paid users and Luna for Free and Go, adding reasoning controls and reducing factual errors.
Read at source: https://www.testingcatalog.com/openai-is-rolling-out-gpt-5-6-luna-to-free-chatgpt-users/