Grok Voice

Optional system instructions describing the agent's persona and conversation context. Uses Grok's default persona when omitted.

URL of the audio containing the user's speech. The Grok agent listens to it and replies with speech. Most common audio formats are supported; the audio is converted to 16-bit 24 kHz mono PCM before being sent to Grok. Maximum duration 10 minutes, maximum file size 50 MB.