OpenAI · model release
GPT-5.6 family (Sol, Terra, Luna)
· first shown 26 June 2026
OpenAI releases three GPT-5.6 models: a flagship, an everyday model and a cheaper, lighter one.
In detail
OpenAI launched the GPT-5.6 family for general availability after a limited preview that began on 26 June 2026: Sol as the new flagship, Terra as a balanced model for everyday work, and Luna as the most cost-efficient model.
Sources
- GPT-5.6: Frontier intelligence that scales with your ambition · OpenAI · Primary source
- Previewing GPT-5.6 Sol: a next-generation model · OpenAI · Primary source
Last checked 11 November 2026.