On July 10, 2026, OpenAI officially released the GPT-5.6 series of models, including three sub-models: Sol, Terra, and Luna. On the same day, OpenAI announced that the Codex app would be repackaged as the ChatGPT desktop app, split into Work and Code tabs. This integration aims to unify development tools and general assistant into a single interface, but the execution has sparked controversy.
OpenAI posted on X: 'GPT-5.6 is here. Codex is now available inside ChatGPT.' They also announced an AMA on r/Codex from 9:30-10:30 AM PT that day, with the Codex team answering developer questions. The AMA topics covered GPT-5.6, Codex in ChatGPT, Sites, and computer use.