GoKawiilOpenAI adds GPT-6 Sol and Luna models to Codex and ChatGPT Work
OpenAI has rolled out two new GPT-6 tier models, Sol and Luna, to Codex and ChatGPT Work following its earlier release of the flagship GPT-6 Astra model this month. Both models use fewer tokens than their GPT-5.6 equivalents, with Sol aimed at complex coding and agentic tasks and Luna suited to high-volume, focused work. The rollout covers Plus, Pro, Business, Enterprise and Edu accounts, with Free and Go users able to access Luna via the desktop app, though Enterprise admins must enable access.
GoKawiil's interpretation of the reporting above, not reported fact.
The move suggests OpenAI is trying to make its most advanced model family more affordable and accessible across usage tiers rather than keeping top performance locked to one expensive model. A tweet from an OpenAI-linked account claims a 50% permanent API price cut for these models, which could open up new lower-cost use cases if accurate. The apparent absence of a mid-tier 'Terra' model hints at a restructured lineup, though OpenAI has not confirmed this as final.
- GPT-6 Sol and Luna now available in Codex and ChatGPT Work, not standard Chat.
- Both models reportedly use fewer tokens than GPT-5.6 counterparts, cutting costs.
- A mid-tier GPT-6 Terra model appears missing, hinting at a three-tier Terra/Sol/Astra structure.
Source: 9to5mac.com — Zac Hall, 2026-09-22
Published there as: “OpenAI upgrading ChatGPT and Codex with two more GPT-6 models”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.