Realtime voice
Low-latency streaming voice — VibeVoice-Realtime next to OpenAI's latest realtime model and CosyVoice 2.
VibeVoice-Realtime 0.5B open · self-host | GPT-Realtime-2 API OpenAI · 2026 | CosyVoice 2 Apache-2.0 Alibaba | |
|---|---|---|---|
| Type | streaming TTS | speech-to-speech | streaming TTS |
| First-audio latency | ~300 ms | low | ~150 ms |
| Streaming input | check | check | check |
| Reasoning / dialogue | — | check | — |
| Live translation | — | check | — |
| Open / self-host | check | — | check |
| License | MIT | Proprietary | Apache-2.0 |
| Context window | 8K | 128K | — |