DevDay preview lists GPT-6 Sol, Terra and Luna family
A developer's list of expected September 29 DevDay announcements includes the GPT-6 family with Sol, Terra and Luna, plus Astra Aeon and GPT-Image-2.5.

OpenAI DevDay is happening on September 29, and these are the major things I am expecting: - GPT-6 family: Sol, Terra and Luna. - GPT-6 Astra Aeon: A long-horizon variant designed to run models/tasks for days or even weeks. - GPT-Image-2.5: Higher-quality results and faster generation. - OpenAI's first device: They could tease their first hardware device, reportedly targeting a February consumer release. - Astra's successor: We could get a tease of the next model after Astra, codenamed Bel the 10T+ parameter model.