OpenAI has moved GPT-5.6 from rollout watch to released model family. The important detail is not just the model name; it is where each model appears. Sol, Terra, and Luna do not have identical access across standard ChatGPT, Work, Codex, and the API.
AILinkBase status
GPT-5.6 is now marked released. Best AI Models, Best AI Agents for Business, and Best AI Coding Models are marked for review, not automatically re-ranked.
Access by product surface
| Surface | GPT-5.6 access |
|---|---|
| Standard ChatGPT | Sol powers eligible reasoning options. Terra and Luna are not directly selectable. |
| Work in ChatGPT | Sol, Terra, and Luna for eligible paid plans. |
| Codex | Terra for Free and Go; Sol, Terra, and Luna for eligible paid plans. |
| OpenAI API | Sol, Terra, and Luna. |
Why ChatGPT Work matters
ChatGPT Work is the product shift to watch. It turns ChatGPT into a longer-task agentic workspace for apps, files, documents, spreadsheets, reports, Sites, Codex, and connected tools. That creates a new enterprise checklist: connector permissions, approvals, audit logs, data boundaries, and usage budgets.
What teams should do now
- Developers: test Sol, Terra, and Luna separately before changing production model routing.
- Business teams: treat Work as an agent deployment, not a normal chat feature.
- Admins: define connector permissions, human approvals, audit logs, and data access boundaries before wide rollout.
Sources: OpenAI GPT-5.6 release · OpenAI GPT-5.6 Help Center · GPT-5.6 System Card · ChatGPT Work tool page