GPT-5.4 is launching, available now in the API and Codex and rolling out over the course of the day in ChatGPT. (opens in new tab)

GPT-5.4 is launching, available now in the API and Codex and rolling out over the course of the day in ChatGPT. It's much better at knowledge work and web search, and it has native computer use capabilities. You can steer it mid-response, and it supports 1m tokens of context.