Amazon Nova 2

AWS has released AgentCore, a new platform for hosting and running voice-based AI agents, integrated with Amazon Nova 2 Sonic for real-time speech capabilities. The platform uses the open Model Context Protocol (MCP) to connect agents to backend systems and deploys each conversation in isolated microVMs.

Loka built a conversational voice agent using Amazon Nova 2 Sonic that achieved 87.0% speech reasoning accuracy on Big Bench Audio, surpassing GPT Realtime at 83.0% and Gemini 2.5 Flash Native Audio at 71.0%. The system delivers Time to First Audio of 1.39 seconds at approximately $0.27 per hour of input audio.