OpenAI Debuts GPT‑5.6 Sol, Terra, and Luna Under Restricted Release

OpenAI has launched a limited preview of its GPT‑5.6 series, introducing three models: Sol, Terra, and Luna. Terra offers performance similar to GPT‑5.5 at half the price, while Luna provides strong capabilities at the lowest cost in OpenAI’s lineup. The flagship Sol model delivers major improvements in coding, biology, cybersecurity, and advanced reasoning, including a new “ultra” mode that uses sub‑agents for complex tasks. OpenAI says Sol includes its strongest safety system yet, designed to support defensive cybersecurity work while restricting harmful use. The Trump administration has limited the public release of GPT‑5.6, allowing access only to a small group of trusted partners until a new federal AI review process is finalized. OpenAI disagrees with making this government approval process the long‑term norm but accepted temporary restrictions to enable a broader rollout soon.

Read the full story on MacRumors →