OpenAI is set to publicly launch GPT-5.6 Sol, Terra, and Luna on Thursday, July 9, 2026, after a government-requested limited preview and additional testing reportedly cleared the way for wider access.
TL;DR
- OpenAI will publicly launch GPT-5.6 Sol, Terra, and Luna on July 9, 2026.
- The models were initially limited to trusted partners after a US government request.
- GPT-5.6 Sol is OpenAI’s strongest model yet, with stronger coding, biology, and cybersecurity capabilities.
- OpenAI says the model family includes additional safeguards and deployment testing.
OpenAI is moving ahead with the public launch of GPT-5.6, its latest family of artificial intelligence models, after the US government reportedly cleared restrictions that had limited early access.
India Today reported that OpenAI announced a global release for GPT-5.6 after US restrictions were lifted. Reuters also reported that OpenAI will publicly launch GPT-5.6 on Thursday, July 9, 2026, after delaying the broader release last month at the US government’s request.
The release covers three models: GPT-5.6 Sol, GPT-5.6 Terra, and GPT-5.6 Luna. OpenAI describes the new naming system as one where the number identifies the model generation, while Sol, Terra, and Luna identify durable capability tiers that can advance on their own cadence.
The company said the family gives people and developers clearer choices across intelligence, speed, and cost. OpenAI also said GPT-5.6 is priced across three model sizes: Sol at $5 per 1 million input tokens and $30 per 1 million output tokens, Terra at $2.50 per 1 million input tokens and $15 per 1 million output tokens, and Luna at $1 per 1 million input tokens and $6 per 1 million output tokens.
The regulatory angle is central to this launch. OpenAI’s official preview said the company had begun with limited access and that it was “excited to continue learning from this preview period, and to bring GPT-5.6 Sol, Terra and Luna to more people soon.”
Reuters reported that OpenAI had limited GPT-5.6 access to a small group of vetted partners whose details were shared with authorities. Reuters also said OpenAI’s broader public launch comes after the US government’s request for a delayed rollout amid national security concerns that powerful AI systems could be misused.
Axios reported that the Trump administration gave OpenAI the green light for a wider release after additional testing and meetings between company and government officials. It also reported that testing was carried out by the Center for AI Standards and Innovation within the Department of Commerce.
OpenAI’s own deployment safety material shows why the rollout attracted scrutiny. The GPT-5.6 Preview System Card says the company treats GPT-5.6 Sol as High capability in cybersecurity, but below Critical, and extends that designation to Terra and Luna. The system card also says Sol reached 96.7% on OpenAI’s internal Capture-The-Flag tasks, while Terra and Luna also crossed the company’s Preparedness High threshold.
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The system card also outlines health and biology evaluations. OpenAI said GPT-5.6 Sol scored 60.5 on HealthBench Professional on a length-adjusted basis, up 8.7 points from GPT-5.5, while SecureBio found GPT-5.6 Sol or its railfree variant achieved the highest scores to date on several expert-level biology benchmarks.
For developers and enterprise users, the GPT-5.6 rollout marks a major expansion from limited preview to public access. However, product-level availability details across ChatGPT, Codex, and the API should still be tracked through OpenAI’s official release channels.
