New Delhi, June 27 (IANS): OpenAI has announced that its new GPT-5.6 models – Sol, Terra and Luna – will initially be rolled out in a limited preview to trusted partners, with a broader release planned in the coming weeks. According to the company, the models introduce advances in reasoning, coding and cybersecurity capabilities. OpenAI said it briefed the US government on GPT-5.6’s capabilities ahead of the launch and agreed to a request for a limited release while federal authorities develop a broader framework for evaluating advanced AI models under a recent cybersecurity executive order. The company said it intends to make the models available across ChatGPT, the API and Codex in the coming weeks, while emphasising that government preview requirements should not become a permanent standard for future frontier AI releases. The launch comes amid increasing scrutiny of advanced AI systems in the United States.
OpenAI described GPT-5.6 Sol as its flagship model designed for demanding scientific workloads, while Terra is positioned as a balanced model for enterprise and developer tasks, offering performance comparable to GPT-5.5 at roughly half the cost. Luna has been introduced as the company’s fastest and most affordable model for cost-sensitive applications. OpenAI said Sol will be available on Cerebras hardware in July for select customers, delivering inference speeds of up to 750 tokens per second. The company added that Sol features Max Reasoning Effort, allowing it to spend more time solving complex problems, and an Ultra Mode that deploys multiple specialised sub-agents to improve coding, research and multi-step workflows. Separately, US-based AI company Anthropic received approval from US authorities to restore limited access to its Mythos 5 model for certain trusted partners after addressing national security concerns that had led to temporary restrictions on access for foreign nationals.