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Models & Products
GPT-5.4
A later GPT model that handles voice, images, and text in one network, with built-in step-by-step reasoning.
Definition
GPT-5.4 is a later model in OpenAI's GPT line, built so that voice, images, and text all pass through a single network, which speeds up responses and preserves fine detail in audio such as tone of voice. It builds in the kind of slow, step-by-step reasoning that earlier lived in separate reasoning models, and is positioned as a cost-efficient everyday workhorse.