On July 6 2026, X user @thsottiaux replied to @haider1, stating that Ultra will be included in Codex. The tweet was posted at 12:54 AM UTC and received 144,000 views. Codex is a development platform that supports multiple language models. Ultra is described as a version of GPT‑5.6. The statement has not been confirmed by Codex developers or by OpenAI, and no official release schedule has been announced.