Expired50% confidenceBenchmarkExact time
ElevenLabs' released Eleven v4 Turbo has a median time to first audio (TTFA) latency of about 150 milliseconds in the official WebSocket benchmark tests.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/13/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/27/2026(expired)
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Related Claims
UnverifiedThe time-to-first-byte latency for mainstream TTS solutions such as ElevenLabs, Azure Neural Voice, and Google WaveNet is approximately 150–300 milliseconds.76% similarUnverifiedThe industry generally believes that when time to first audio (TTFA) is below 300ms, conversation is already close to the rhythm of human turn-taking, and at 150ms it is almost imperceptible as machine latency.74% similarUnverifiedWhen current mainstream large models handle complex code tasks, the time to first token (TTFT) is often between 2 and 8 seconds.72% similarUnverifiedAmong the top ten models, TTFT ranges from 748.61 seconds to 2.82 seconds, a difference of up to 265 times.72% similarUnverifiedUsing TaoMate's 3-step ref2va turbo LoRA, generating a 9.4-second clip on an RTX 3090 takes approximately 4–5 minutes, a significant speedup compared to 12.5 minutes with 8 steps.70% similar
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