The big headlines on this release are efficiency, with OpenAI reporting that GPT-5.4 uses far fewer tokens (47% fewer on some tasks) than its predecessors).

Daniel Farke led Norwich to the FA Cup quarter-finals in 2020 and now his old team are hoping to do so again by knocking out his current club Leeds United.

ChatGPT is now using its 5.4 Thinking model for deeper reasoning, and it's even better at handling "professional work." ...