GPT-5.6 Sol's launch moved it from a restricted preview to general availability. OpenAI's June 26 preview announcement limited participation to a small group of trusted partners at the U.S. government's request.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
benchmark — A standard public test set for comparing AI models — the shared scoreboards behind every "model X beats model Y" claim.
eval — A repeatable test for AI quality — a set of tasks plus scoring — used the way software teams use test suites, because model output is too variable to judge by eyeballing.
