205 ms P50 time-to-first-audio on Speko; ranked 31st of 112 in the TTS for Voice Agents 2026 index.
Benchmark summary: 20/100, ranked 31st of 112 in the TTS for Voice Agents 2026 index (Listed). Strongest criterion: accuracy, 7.4 of 15 points.
ElevenLabs Eleven v4 Turbo is a text-to-speech (TTS) API from ElevenLabs, measured by one independent benchmark, Speko.
Overall score
20 /100
Data checked on September 30, 2026
Updated after each benchmark capture
Every point comes from a public benchmark: sources · methodology
ElevenLabs Eleven v4 Turbo ranks 31st of 112 in the 2026 text-to-speech (TTS) API benchmark, with a score of 20/100.
Speko measures a P50 TTFA of 205 ms from US East (n=30), dated September 28, 2026: 14th lowest of the 29 models Speko measures.
Speko rates its pronunciation robustness on numbers, dates and currency at 0.9 on a 0-to-1 scale (the highest of the 28 models Speko rates).
Speko rates its naturalness at 1,670 Elo from blind A/B votes (2nd highest of the 41 models Speko rates).
Speko lists a cost of about $40 per 1M characters.
Speko changed its pronunciation robustness between the captures of September 30, 2026 and October 1, 2026 without a new measurement date (1, then 0.9): the score uses the average, 0.95. The value shown is the latest.
SpeechifyAI Simba 3.0 is a proprietary text-to-speech (TTS) API from Speechify, measured by two independent benchmarks: Artificial Analysis and Coval.
Google Chirp 3: HD is a proprietary text-to-speech (TTS) API from Google, measured by two independent benchmarks: Artificial Analysis and Coval.
Google Gemini 3.1 Flash TTS is a proprietary text-to-speech (TTS) API from Google, measured by two independent benchmarks: Artificial Analysis and Speko.