9to5Mac article
OpenAI upgrading ChatGPT and Codex with two more GPT-6 models
https://9to5mac.com/2026/09/22/openai-upgrading-chatgpt-and-codex-with-two-more-gpt-6-models/
Article summary.
Earlier this month, OpenAI released the first GPT-6 models with Astra. The GPT-6 product line is now expanding with two new GPT-6 Sol and GPT-6 Luna models.
According to the ChatGPT desktop app release notes, GPT-6 Sol and GPT-6 Luna are designed to use fewer tokens than GPT-5.6 models of the same tier.
GPT-6 Sol and GPT-6 Luna are being sequentially rolled out to Codex and ChatGPT Work with lower token costs than previous generation GPT-5.6 models. Use Sol for complex coding and agent-like workflows, and Luna for focused bulk tasks.
Both models will be sequentially available to Plus, Pro, Business, Enterprise, and Edu users. Free and Go users can access Luna in the desktop app. Actual availability may vary depending on deployment progress and workspace settings, and Enterprise users require administrators to activate the new models.
Both models are available for Work and Codex in ChatGPT, but not for general Chat.
The Terra model, which was a mid-tier option between Sol and Luna in 5.6, was excluded from this announcement. [Rest of the content omitted]
https://x.com/OpenAI/status/2102460975790137662
