[OpenAI Codex to Integrate Next-Generation Flagship Model GPT-5.6 Sol Ultra] According to a report by Jinse Finance, on July 6, OpenAI's core product lead Thibault Sottiaux confirmed on social media that the Ultra version of the next-generation flagship model GPT-5.6 Sol will be integrated into Codex. Previously, some users complained that OpenAI's decision not to include GPT-5.5 Pro in Codex was a major oversight. They suggested that if GPT-5.6 Ultra could be integrated, developers might no longer need to pay for Claude. Sottiaux subsequently confirmed publicly that the Ultra version is indeed part of Codex's roadmap.