OpenAI is bringing its newest generation of AI models to the public on Thursday, capping off a carefully staged rollout that began with a closed preview for government-vetted partners.
The models dropping Thursday belong to the GPT-5.6 family, a three-tier lineup built for different use cases and budgets.
Three models, one launch
The GPT-5.6 family consists of Sol, Terra, and Luna. Sol is the flagship, positioned as OpenAI’s most capable model to date. Terra sits in the middle tier, balancing performance with accessibility. Luna is the efficient option, built for speed and lower compute costs.
Sol is designed to excel in coding, scientific research, and cybersecurity tasks. It also ships with what OpenAI describes as an advanced safety framework.
