OpenAI releases GPT-5.6, along with a 'working' AI agent OpenAI has officially launched the GPT-5.6 series models, which include Sol, Terra, and Luna. These are now gradually rolling out across ChatGPT, Codex, and the API. At the same time, OpenAI introduced a new AI agent product called ChatGPT Work, powered by Codex and GPT-5.6. It can execute tasks across apps and files, handle projects for hours on end, and directly turn goals into completed work outcomes.