OpenAI has introduced GPT-5.6, its latest generation of artificial intelligence (AI) models. Instead of launching a single model, the company has released a family of three models, Sol, Terra and Luna, designed for different levels of performance, speed and cost.
However, unlike previous launches, GPT-5.6 is not yet available to all users. The company is rolling it out first to a small group of trusted partners before making it available more broadly through ChatGPT, the API and Codex.