A startup cut live voice costs from $4.50/hour to $0.85/hour with Gemini Live
Due_Childhood_4034 · reddit · 2026-07-29
A language-learning startup says it cut live voice costs from $4.50/hour to $0.85/hour by removing its own backend from the audio path and switching to Gemini Live over a single bidirectional WebSocket.
The author reports end-to-first-audio latency dropping from 4–6 seconds to 1.0–1.7 seconds, and shares several integration lessons: replaying history as role: model breaks the socket, NOINTERRUPTION was needed to stop self-barging on speaker feedback, and preview models can fail with 1011 resource exhausted even at low quota usage. The remaining issue is occasional stalls mid-turn, which currently require a reconnect and transcript reseed.
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