Grok can speak new lines in a clone of your voice

A video is nearly finished when one sentence needs changing. Usually, that means another recording session, complete with the search for a quiet room.

With xAI’s Custom Voices, a recording of up to two minutes becomes a reusable synthetic voice. An application can make it speak new text or answer questions in a live conversation. The words can be new; the voice can sound like yours.

The model captures vocal tone and patterns of delivery. That makes the sample more than a sound check: a stiff reading can produce a stiff voice. Background noise can also carry over. Apparently, the fan in the corner wants a speaking role too.

For a creator, this could mean revising narration without recording every line again. For an assistant, it means giving generated replies a familiar voice—even when you never personally said those words.

This is a developer feature accessed through xAI’s voice APIs. Custom voices are restricted to the account’s team, and the feature is currently available only in the United States, excluding Illinois.