OpenAI has unveiled its next-generation GPT 5.6 family of AI models, but for perhaps the first time ever, the company’s most advanced AI models will be out of reach for almost everyone.
The new GPT 5.6 lineup includes three model versions, namely: Sol, its flagship model that is said to be the most capable; Terra, a mid-tier version that is more balanced for everyday use; and Luna, a fast and affordable version of the model.
GPT 5.6 Sol is the best-performing model out of all of them based on testing on benchmarks related to cybersecurity, biology, and agentic abilities. It has also been developed with a “layered safeguard stack,” which looks to prevent bad actors from using its AI model for cyberattacks, among other malicious behaviours, according to OpenAI.
The public release of these models has been delayed indefinitely at the request of the US government, OpenAI said in a blog post on Friday, June 26. Only a small set of customers who have been pre-approved by the US government will be able to access these models, as per the company.
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