OpenAI has officially launched GPT-5.6, its latest family of frontier AI models comprising Sol, Terra, and Luna. Sol serves as the flagship model for advanced reasoning, coding, cybersecurity, and scientific workloads, while Terra balances performance and cost, and Luna targets high-volume, cost-efficient deployments.
The release also introduces improved token efficiency, stronger agentic capabilities, and enhanced safety measures for enterprise use. GPT-5.6 is rolling out across the OpenAI API, Codex, and ChatGPT, alongside new enterprise-focused features that support long-running workflows and autonomous task execution.
OpenAI says the new model family is designed to deliver higher performance with greater operational efficiency.
