OpenAI· GPT / ChatGPT / APICapability change

Introducing next-generation audio models in the API

Developers can now instruct the text-to-speech model to speak in a specific style, such as 'talk like a sympathetic customer service agent', unlocking new customization for voice agents.

From the source

For the first time, developers can also instruct the text-to-speech model to speak in a specific way—for example, “talk like a sympathetic customer service agent”—unlocking a new level of customization for voice agents.

openai.com

Announced

20 Mar 2025 11:00 UTC

Detected

03 Aug 2026 21:11 UTC (+501d after)