Snapshot 2026-10-25. Every number links to a public source. A dash means the vendor does not publish it.
| API | Full-duplex | Price | Response time | Faithfulness | Task success | Languages |
|---|---|---|---|---|---|---|
 GPT-Live 1OpenAI | Full-duplex | $0.05/min | 798 ms | — | 79.9% | — |
| Full-duplex | $32 in, $64 out | 1.41 s | 49.4% | — | — | |
 Gemini 3.8 LiveGoogle DeepMind | Full-duplex | $3 in, $12 out | — | 42.1% | 68.5% | 99 |
| Full-duplex | $0.08/min | — | 66.2% | — | 16 | |
 Eleven Realtime (v1 Mini / v1 Max)ElevenLabs | Cascade | $0.08/min | — | — | — | 90 |
 Amazon Nova 2.5 SonicAmazon / AWS | Full-duplex | $3 in, $12 out | — | — | — | 7 |
 Qwen-Audio Realtime (3.0 / 3.1)Alibaba Cloud | Full-duplex | $6.4 in, $24 out | 1.92 s | — | — | 11 |
 StepAudio 3 RealtimeStepFun | Full-duplex preview | — | — | — | — | 2 |
