GPT-6 Sol and Luna roll out to Codex and ChatGPT Work
OpenAI says GPT-6 Sol and GPT-6 Luna are rolling out to Codex and ChatGPT Work for listed paid plans, with Luna also available to Free and Go users in the desktop app. Codex CLI users can select either model with /model or a --model command.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-09-22
Where the models are available
OpenAI's September 22 release notes say GPT-6 Sol and GPT-6 Luna are rolling out to Codex and ChatGPT Work. Both are rolling out to Plus, Pro, Business, Enterprise, and Edu users. Free and Go users can access Luna in the desktop app.
Availability depends on rollout and workspace settings. Enterprise administrators must enable the new models. In ChatGPT, the models are available in Work and Codex, but not Chat. The announcement gives no specific prices, so it does not establish what either model costs within a plan.
Sources: Openai release notes: 2026-09-22
Choose a model in Codex CLI
When the model is available, select it with /model or pass its name when starting a task: codex --model gpt-6-sol or codex --model gpt-6-luna. OpenAI recommends Sol for complex coding and agentic workflows, and Luna for focused, high-volume tasks.
The notes point readers to separate model-selection and migration guidance, pricing information, and workspace availability controls. They do not provide token rates in this announcement.
Sources: Openai release notes: 2026-09-22
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-09-30. Editorial process and corrections.