Google shipped gemini 3.8 live and a live extended thinking variant on september 18, betting that…
google shipped gemini 3.8 live and a live extended thinking variant on september 18, betting that the next model war is voice latency, not benchmark scores. realtime dialogue rewards models that think while they talk, which changes what the whole stack optimizes for.
the metric that will decide this round is measured in milliseconds.
Context
Google's announcement, dated 15 September 2026 and updated 17 September 2026, introduces two models, Gemini 3.8 Live and Gemini 3.8 Live Extended Thinking, the second built for high-complexity tasks with multi-step reasoning. It says they work with tools in the background while the user keeps talking, support 97 languages and are available through the Gemini Live API on partner platforms. The Gemini API docs list the model id gemini-3.8-live-extended-thinking, with the latest update in September 2026.
Google's own date is 15 September 2026, not 18 September, which is the day of the note. Exact rollout by product and region was not read. The blog shows evaluation charts, but no latency figure in milliseconds was extracted, so the claim that the next model war is voice latency is the author's opinion with no number behind it here.
Watch next
- Independent latency measurements.
Sources
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 19 September 2026 at 00:19 IST. Sources are the papers and datasets the note draws on.
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