OpenAI unveiled GPT-5.6 at the end of June, but the public release was held back while the U.S. government reviewed the new AI models. Now the company has shared an update on when customers will be able to use the upgraded model: this week.

GPT-5.6 is coming on Thursday

To recap, OpenAI announced three versions of GPT-5.6:

Sol, OpenAI’s flagship model

Terra, their balanced model for everyday work

Luna, their fast and affordable model

The Sol, Terra, and Luna naming scheme is also new with GPT-5.6.

“In this new naming system introduced with GPT‑5.6, the number identifies a model’s generation, while Sol, Terra, and Luna identify durable capability tiers that can advance on their own cadence,” OpenAI said in June . “Together, the family gives people and developers clearer choices across intelligence, speed, and cost.”

OpenAI also said it would only share access to GPT-5.6 models with a small group of trusted partners at the U.S. government’s request.…