GPT-6 Sol and GPT-6 Luna: October 2026 Update
We’re launching GPT-6 to everyone in ChatGPT, across free and paid plans globally. These models will replace GPT-5.6 Sol and GPT-5.6 Luna in ChatGPT. Users accessing GPT-6 Sol and GPT-6 Luna in Codex, and via ChatGPT Work, are still using previously released versions. In this system card, we distinguish these models by their month of release: October for the versions released today, and September for the versions that remain in use in Codex and Work. See our blog for details.
TL;DR
- GPT-6 is now available to all ChatGPT users worldwide.
- These models replace GPT-5.6 Sol and GPT-5.6 Luna in ChatGPT.
- Users in Codex and ChatGPT Work are on earlier September versions.
- Today's released versions are distinguished by their October release month.