Google DeepMind launches Gemini 3.8 Live and Extended Thinking

Fathom.news reports that Google DeepMind launched Gemini 3.8 Live and Extended Thinking, with SynthID watermarking on all generated audio across consumer, developer and enterprise tiers. A user says the models were released on September 15, 2026, and execute tool calls and API requests mid-conversation, using verbal cues such as "let me check that" instead of going silent.