GPT‑5.4 - OpenAI's most efficient model: less tokens, more clarity
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GPT-5.4 Thinking delivers deeper web research, stronger context retention on long tasks, and 33% fewer factual errors than its predecessor. You can now interrupt the model mid-response and redirect it. No need to start over. Same intelligence. More control. Less token burn by default.
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I really like this model’s style. After a year and a half of ornate markdown and over-structuring, it is refreshing to interact with something that feels more alive. It immediately feels like a model designed to work, not just to talk. And when used carefully, it can do genuinely unreal things. I once uploaded a ZIP archive of MRI scans and got back a summary that felt surprisingly close to the level of my radiologist’s written conclusion.
That said, there is still a noticeable gap in user intuition and interface intuition. The model handles standard situations extremely well, but it does not always grasp what is actually convenient for a human in common-sense terms and what is not. Unfortunately, knowledge does not always translate into intuition