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Grounded to blog.google Gemini 3.8 Live / Extended Thinking post. Benchmarks and rollout surfaces match primary. Speculative token limits and wrong Workspace tier claims removed.

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Home/Tech/Google Launches Gemini 3.8 Live and Extended Thinking Voice Models
VERIFIEDBy Xavier Rivera·Tuesday, September 15, 2026 at 6:29 PM AST·2 min read

Google Launches Gemini 3.8 Live and Extended Thinking Voice Models

Google launched Gemini 3.8 Live and Gemini 3.8 Live Extended Thinking on September 15, 2026: near real-time voice dialogue models with visual grounding, 97-language mid-conversation switching, and background tool use. Extended Thinking adds simultaneous reasoning and leads Google-cited speech and agentic benchmarks, with rollout across Gemini API, AI Studio, Search Live, Gemini Live, and Workspace Live surfaces.

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Google Launches Gemini 3.8 Live and Extended Thinking Voice Models
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TL;DRAI · 60 sec read

Google’s Gemini 3.8 Live models add fluid voice agents with visual context and background tool calling; Extended Thinking keeps talking while it reasons, with Google-cited speech and agentic benchmark leads as the models roll into API, Search Live, Gemini Live, and Workspace.

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⚐ CORRECTEDTuesday, September 15, 2026 at 6:30 PM EDT

Pre-publish harden (THE-128): removed claims not in Google’s Sep 15, 2026 primary — token limits 131072/65536, ultra-low/fixed latency profile wording, March 2026 3.1 Flash Live migration aside, and incorrect Workspace tier mapping (Docs: AI Pro/Ultra; Gmail/Keep: all Google AI subscribers).

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Google introduced Gemini 3.8 Live and Gemini 3.8 Live Extended Thinking on September 15, 2026, describing them as its most advanced live dialogue models yet.

Gemini 3.8 Live is positioned for scale and cost efficiency. Google says the model combines conversational intelligence with fluid dialogue and visual grounding. It processes visual inputs in near real-time, automatically detects and transitions between 97 supported languages mid-conversation, and can execute tools and API calls in the background while continuing to talk. Google also reports a high user preference result that placed the model second in the Speech Agent Arena, and frames it as a capable, efficient option built for scale.
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Gemini 3.8 Live Extended Thinking targets higher-complexity work. Google says the model reasons and speaks simultaneously, using early verbal cues such as “Let me check that…” and live progress narration so multi-step background tasks can continue without breaking conversational flow. On Artificial Analysis’ Speech to Speech Quality Index, Google reports a score of 82.6 and the #1 overall spot. Google also cites 68.6% on τ-Voice and 35.1% on Sierra’s τ-Voice-banking for agentic task completion, plus 97.7% on Big Bench Audio.

Rollout surfaces span developers, enterprises, and consumer Google products. According to Google, 3.8 Live is rolling out in the Gemini API and Google AI Studio for developers; in private preview in Gemini Enterprise for enterprises (with Gemini Enterprise for Customer Experience described as coming soon); and in Search Live for everyone. 3.8 Live Extended Thinking is likewise available in the Gemini API and Google AI Studio; in private preview in Gemini Enterprise (with broader enterprise and Workspace business availability described as coming soon); and for everyone in Gemini Live, with Google AI Pro and Ultra subscribers getting Workspace access in Docs, and all Google AI subscribers getting access in Gmail and Keep.
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Google also points developers to the Live API ecosystem and safety controls. Platforms cited as enabling voice-driven interfaces via the Gemini Live API include Agora, Fishjam, LangChain, LiveKit, Pipecat, Vercel, and Vision Agents. Google says all audio generated by its AI products is watermarked with SynthID and points readers to the model card for safety and responsibility details.
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