On July 9, 2026, OpenAI officially launched the GPT-5.6 series models, comprising three variants: the flagship Sol, the balanced Terra, and the cost-effective Luna. These models are now available to global users via ChatGPT, Codex, and the OpenAI API. The GPT-5.6 series achieves industry-leading performance across multiple benchmarks while significantly reducing inference costs and response times, sending a clear signal to the competitive landscape of the AI industry.
