OpenAI previews GPT-5.6 models Sol, Terra, and Luna

TL;DR

• OpenAI has started previewing three GPT-5.6 models: Sol, Terra, and Luna.
• OpenAI says Sol is tuned for cybersecurity tasks and includes safeguards against weaponized use.
• OpenAI says Terra and Luna are designed for efficiency and lower operating cost.

OpenAI has started previewing three new GPT-5.6 models, named Sol, Terra, and Luna. Android Authority reported that OpenAI detailed the models in a preview announcement, with availability expected over the coming weeks.

OpenAI said Sol is designed for stronger performance on cybersecurity tasks. OpenAI also said Sol is built to resist attempts to weaponize its output.

OpenAI said Terra and Luna are balanced for efficiency and reduced cost of operation. The source report did not provide release dates, pricing, or technical specifications for the three GPT-5.6 models.

Related questions

• What are the three OpenAI GPT-5.6 preview models?
• What is OpenAI Sol designed for?
• How does OpenAI describe Terra and Luna?