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2026-09-10 · Source：Unite AI
OpenAI has brought its real-time voice system to the API at five cents per minute, with the model handling speech while paired tools such as Codex do the reasoning.
OpenAI has released GPT-Live-1 through its developer API, with the launch dated September 10, 2026. The company describes the model as a full-duplex voice system, and it is priced at $0.05 per minute for the front-end voice layer. The release takes the conversational system behind ChatGPT Voice and extends it to third-party applications and business workflows built by outside developers.
The defining characteristic of GPT-Live-1 is simultaneity: the model can speak and listen in parallel rather than handling input and output in strict alternation. That full-duplex behavior underpins the natural flow of conversation in ChatGPT Voice. Exposing the system through the API means developers can now embed the same real-time voice interaction directly into their own applications and business workflows.
According to OpenAI, GPT-Live-1 is not built to shoulder the full cognitive load of an interaction on its own. The company said the model hands off deeper reasoning and actions to the models and tools it runs alongside — a division of labor demonstrated with Codex and ChatGPT Work. In that architecture, GPT-Live-1 operates as a responsive conversational front-end, while the paired systems carry out the substantive reasoning and task execution behind each exchange.
The pricing structure reinforces that split. The $0.05-per-minute rate applies specifically to the front-end voice layer, framing spoken interaction as a separately metered component rather than an all-in offering. For developers, the arrangement points to a modular stack: conversation minutes are billed at one rate, while the reasoning models and tools enlisted to do the actual work sit behind the voice layer and are paired with it as needed. GPT-Live-1, in other words, is positioned as the audible interface to a broader AI system rather than a self-contained product.
Mots-clés: OpenAI · GPT-Live-1 · Voice AI · API · Codex
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