What changed: OpenAI released prompt-to-voice for all API customers: a custom voice can be created from a text description via the API or the voice Playground, then reused in GPT-Live sessions. Creating a prompt-generated voice is free, while speech generation uses regular GPT-Live session billing. OpenAI also added nine natural voices for GPT-Live: Nuri, Juni, and Flitz (German); Brise and Sillage (French); Nira (Hindi); Harema and Shida (Japanese); and Noeul (Korean).
Who is affected
All OpenAI API customers using GPT-Live (businesses and developers).
What it means for your business
For businesses using GPT-Live, this means they can design a brand-specific voice from a text prompt and use it via the API or voice Playground; creating the voice is free, and speech generation is billed under normal GPT-Live session usage.
What to do
If you use GPT-Live, create a custom voice via the API or voice Playground using a text description, try the new natural voices (German, French, Hindi, Japanese, Korean), and apply your chosen voice in your sessions.
When it takes effect
In effect for all API customers as of October 16, 2026.
Source: https://developers.openai.com/api/docs/changelog#2026-10-16
