$0.08 per minute.
There is no free API; it costs $0.08 per minute.
#4 of 17 in Realtime. Strongest at: Speech & Voice.
On Time to first audio · AA, Grok Voice 2.0 scores 0.7 vs 0.6 — about the same. It is 0% more expensive.
No, Grok Voice 2.0 is a closed model available through an API. The closest open-weights option here is Raon SpeechChat 9B.
Grok Voice 2.0 is a closed speech & voice model from xAI.
GPT Live 1 (cheaper), Raon SpeechChat 9B (open weights).