OpenAI has launched the GPT-5.6 family, introducing Sol, Terra, and Luna. The flagship GPT-5.6 Sol delivers stronger performance across coding, science, cybersecurity, and knowledge work while using fewer tokens and lowering costs.

OpenAI also introduced Ultra, a multi-agent mode designed for complex tasks. GPT-5.6 improves computer use, tool calling, software engineering, and the creation of documents, presentations, and spreadsheets.

The company highlighted significant gains in cybersecurity and scientific research while introducing its strongest safety system yet. GPT-5.6 combines enhanced safeguards, continuous monitoring, and expanded misuse protections.

GPT-5.6 is now rolling out across ChatGPT, Codex, and the OpenAI API. The three models are available with API pricing starting at $1 per million input tokens for Luna and $5 for Sol.