Expired50% confidenceTradeoffExact time
Cloud TTS services typically have a time-to-first-byte of 200–500 milliseconds, while locally deployed lightweight TTS models (such as Piper and Kokoro-82M) can reduce latency to under 50 milliseconds, though audio quality is generally slightly lower.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/16/2026
First Seen
Valid until: 10/14/2026(expired)
Sources
Related Claims
UnverifiedThe time-to-first-byte for cloud TTS services is typically 200–500 milliseconds, making it the primary source of latency bottlenecks.84% similarUnverifiedThe average time to first token (TTFT) of mainstream cloud-based LLM APIs is typically between 500 milliseconds and 2 seconds.80% similarUnverified在高并发场景下，一个平均延迟180ms的TTS服务大约每8次响应就有1次飙到400ms以上76% similarVerifiedCommand execution latency on a local area network can be as low as under 5 milliseconds, far superior to the 50–300 millisecond round-trip latency of cloud-based solutions.74% similarUnverifiedThe time-to-first-byte latency for mainstream TTS solutions such as ElevenLabs, Azure Neural Voice, and Google WaveNet is approximately 150–300 milliseconds.74% similar
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