OpenAI has announced that its GPT-5.6 model family, which includes Sol, Terra, and Luna, is rolling out across various applications such as ChatGPT, Codex, and the API. During initial evaluations, Sol achieved a new high score of 53.6 points on the last exam for agentic tasks, indicating its potential as a reliable tool for daily use. These models are currently being made available to users in stages, focusing on their capabilities in agentic tasks through specialized testing benchmarks.

Sol: Sol is one of the models in OpenAI’s GPT-5.6 family, optimized for agentic workflows. It is highlighted in the news for leading performance on specialized evaluations and is among the first in the family to reach users. Access is expanding through OpenAI’s core products and API.
Luna: Luna belongs to OpenAI’s GPT-5.6 family of models and supports agentic task handling. The news indicates it is entering testing and deployment separately across applications. It joins Sol and Terra in the initial distribution phase.
Terra: Terra is a model within OpenAI’s GPT-5.6 family, positioned for practical agent applications. It is part of the phased rollout beginning now alongside Sol and Luna. Users are receiving initial access through ChatGPT, Codex, and the API.
OpenAI: OpenAI is an AI research and deployment company focused on developing advanced generative models and tools. In the current news, it is initiating the rollout of its new GPT-5.6 family of models to users. These models are being deployed across ChatGPT, Codex, and the API for agentic tasks.

Agent Evaluation: Models from the GPT-5.6 family are being assessed for their capabilities in agentic tasks through specialized testing benchmarks.
Model Family Release: OpenAI is rolling out Sol, Terra, and Luna as its GPT-5.6 family of models across ChatGPT, Codex, and the API.