GPT‑5.4
OpenAI's most efficient model: less tokens, more clarity
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GPT-5.4 Thinking is a reasoning model from OpenAI focused on efficiency and control. It offers deeper web research, stronger context retention on long tasks, and about a third fewer factual errors than its predecessor, while using fewer tokens by default.
A new capability lets a user interrupt the model mid-response and redirect it without starting the request over.
It is aimed at developers and users running longer, research-heavy tasks who want the same reasoning quality with more steerability and lower token cost, and the ability to correct course without losing the work so far.
AI-assisted draft, human-reviewed before publishing — see how we choose & review tools.
Why we picked it
GPT-5.4 made the list for the mid-response interrupt-and-redirect specifically — being able to steer a reasoning model without restarting the whole request from scratch is worth naming as a real workflow improvement, not just another efficiency number.
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