GPT-5.4 rumored to launch next week! 2 million context window + persistent state, say goodbye to frequent forgetting
Recently, an OpenAI engineer submitted a pull request to the public Codex GitHub repository and inadvertently included “gpt-5.4”—an unreleased version—in the version check condition. Almost at the same time, screenshots showing the public model endpoint labeled “alpha-gpt-5.4” and dropdown menus circulated wildly on social platform X.