OpenAI released its GPT-5.6 artificial intelligence model family to the public on July 9. The launch followed a limited preview period requested by the U.S. government. Federal officials reviewed the models for advanced capabilities and potential national security risks.
The release features a tiered structure to balance performance and cost. Sol serves as the flagship model for complex reasoning. Terra operates as a balanced mid-tier option for everyday tasks. Luna provides a fast, cost-effective version for high-volume requests.
The new models offer significant improvements in specialized areas like cybersecurity and coding.