Multimodal Realtime API。OpenAI Realtime API (gpt-4o-realtime・WebSocket・voice2voice)・Advanced Voice Mode ChatGPT (Free→Pro・iOS+Android+Web)・Google Gemini 2.5 Live API・Project Astra (Realtime Multimodal Camera+Voice)・Anthropic Claude Voice予告・Hume EVI 2 (Empathic Voice)・Cartesia Sonic 90ms Latency・Sesame CSM-1B・ElevenLabs Conversational AI 2.0・Sindre Sorhus Apple Intelligence Beta・¥¥¥¥¥-¥¥¥¥¥¥¥/M tokens、2026年Voice Realtime主流化。