SpeechifyAI Simba 3.2 Speechify · text-to-speech (TTS) API

Speed

On Coval's 30-day window ending October 22, 2026 (3,368 runs from US East), SpeechifyAI Simba 3.2 starts speaking after 105.8 ms on a typical turn (median) and 172.4 ms on a slow turn (P95, the slowest one in twenty). That P95 is 7th lowest of the 32 models Coval measures, which puts it in the Fast enough tier: fast enough for most agents. On the median it is a tie (gap under 10 ms) with Alibaba Qwen3 TTS 1.7b, Palabra TTS v1 and SpeechifyAI Simba 3.0. Speko's board plots it at 56 ms time to first audio from US East; its model page reports a 85 ms sweep.

Voice quality

Speko rates its naturalness at 1,573 Elo from blind A/B votes on phone-agent lines (12th highest of the 43 models Speko rates). In the Artificial Analysis Speech Arena it holds 1,245 ±12 Elo (95% interval), 10th highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 15th, at 1,248 Elo.

Numbers and dates

Speko's pronunciation test on numbers, dates and currency scores it 0.21 on a 0-to-1 scale (23rd highest of the 30 models Speko scores). This is the accuracy measure used here; Coval's word error rate separates models too little to compare them.

Price

Coval lists $10 per 1M characters (since Sep 22, 2026). Artificial Analysis lists $6.6. Speko lists about $10. List prices, as each source prints them: a range of $6.6 to $10.