This July 9 article captured GPT-5.6 during its rollout-watch phase. It is now superseded by the July 10 release update, where AI Linkbase marks GPT-5.6 as released and separates Sol, Terra, and Luna access across ChatGPT, Work, Codex, and the API.
AILinkBase status
Status changed on July 10: GPT-5.6 is now tracked as released. Use the updated GPT-5.6 and ChatGPT Work pages for current access notes.
What changed?
The GPT-5.6 family now has enough official safety documentation to justify a model status page. The family includes Sol, described as the flagship model, plus Terra and Luna as lower-cost or lighter options. That segmentation matters for developers because cost, rate limits, and policy constraints may differ by version.
Current tracking fields
| Model | Tier | AILinkBase status |
|---|---|---|
| GPT-5.6 Sol | Flagship | Preview confirmed; rollout reported |
| GPT-5.6 Terra | Lower-cost option | Preview confirmed; rollout reported |
| GPT-5.6 Luna | Lightweight option | Preview confirmed; rollout reported |
What should developers do?
Do not assume every GPT-5.6 model appears in the same product picker. Sol, Terra, and Luna differ by product surface: standard ChatGPT, Work, Codex, and API access are not identical.
For AILinkBase rankings, GPT-5.6 is marked for review across Best AI Models, Best AI Coding Models, and Best Enterprise AI Tools. Rankings should wait for stable access, pricing, and practical testing.
Sources: OpenAI GPT-5.6 release · GPT-5.6 System Card · July 10 release update · GPT-5.6 status page