OpenAI confirms GPT 5.6 Sol, Terra and Luna rollout after US govt review
Follow UsOpenAI will make its GPT 5.6 AI models available to everyone this Thursday.
The new lineup includes three models: GPT 5.6 Sol, Terra and Luna.
OpenAI describes GPT 5.6 Sol as its "strongest model" so far
OpenAI will make its GPT 5.6 AI models available to everyone this Thursday. The new lineup includes three models: GPT 5.6 Sol, Terra and Luna. The announcement comes weeks after the company introduced the models in a limited preview for a small group of trusted partners. At the time, OpenAI said it chose a limited release because the US government requested an early preview before the wider launch. The company has now confirmed that the public rollout will begin this week.
SurveyAccording to OpenAI, Sol is the company’s most powerful model yet, Terra is built for everyday use, and Luna focuses on speed and affordability. The company also claims that all three models come with its “most robust safeguards to date.”
GPT-5.6 Sol, along with Terra and Luna, will launch publicly this Thursday.
— OpenAI (@OpenAI) July 8, 2026
We’re expanding preview access globally now. pic.twitter.com/Uk5HcfSc2e
OpenAI GPT 5.6 capabilities
OpenAI describes GPT 5.6 Sol as its “strongest model” so far and also says it is the company’s “most capable model yet for cybersecurity.” OpenAI says Sol delivers better agentic capabilities across coding, biology and cybersecurity tasks. It is designed to help users identify and fix security vulnerabilities without crossing its internal safety boundaries.
For users looking for a more balanced option, Terra offers performance similar to GPT 5.5 at half the price. On the other hand, Luna is aimed at users who need fast responses at a lower price.
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When the GPT 5.6 series was first announced, OpenAI CEO Sam Altman explained why the company was taking a gradual approach to the rollout. He said the gradual release was a “quite reasonable” approach for increasingly capable AI systems, but added that this “isn’t quite the process that we think is optimal.”
Altman also said OpenAI is working with the US government to create a more transparent and reliable process so future AI models can be released to users more quickly.
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The company also made it clear that it does not want government previews to become the normal way of launching AI models. OpenAI said, “It keeps the best tools from users, developers, enterprises, cyber defenders, and global partners who need them. We are taking this short-term step because we believe it is the strongest path to broader availability in the coming weeks, while we work with the Administration to develop the cyber Executive Order framework and a repeatable process for future model releases.”
