tl;dr: Google released Gemini 3.8 Live and 3.8 Live Extended Thinking, two speech-to-speech models aimed at powering voice agents with real-time visual grounding, tool calling, and mid-conversation language switching across 97 languages. The Extended Thinking variant tops Artificial Analysis' Speech-to-Speech Quality Index (82.6) and reasons while speaking, using verbal cues and progress narration during multi-step tasks. Both are available via the Gemini API, AI Studio, and rolling out to Search Live, Gemini Live, and Workspace apps.