Explained: OpenAI’s GPT‑5.6 series’ Sol, Terra and Luna AI models
OpenAI recently unveiled the GPT-5.6 series of artificial intelligence models even as the company moves closer to counter intense competitive pressure and stringent regulatory scrutiny. The AI company introduced three distinct capability tiers designed to balance raw computing power with affordability: the flagship Sol, the mid-tier Terra and the hyper-fast Luna.
OpenAI GPT 5.6 limited rollout
