OpenAI said its GPT-5.6 models Sol, Terra and Luna will be available on ChatGPT, CODEX and its API.

OpenAI founder Altman, when asked about a 2026 IPO, said 'unclear'.

OpenAI CEO Sam Altman said the company made several adjustments to GPT-5.6 following collaborative, two-way consultations with senior Trump administration officials. In the weeks before a full release Altman said OpenAI engaged with Commerce Secretary Lutnick and Treasury Secretary Bessent. Under government pressure to stage the rollout, the model was initially available only to select partners; after OpenAI said it had secured sign-off from US government leadership, GPT-5.6 was scheduled to open to the public on Thursday. Altman declined to detail the specific adjustments, saying government teams are testing the model for potential issues and that a transparent, fair and rapid process is preferable; he added OpenAI now better understands the process and expects future model rollouts to run more smoothly.