Voice AI BenchmarksBy

PROVIDERLAST 30 DAYS

official resource

SpeechifyAI voice AI models and benchmarks

SpeechifyAI lists 2 TTS models in Coval. Its fastest dated TTS result is Simba 3.0 at mean 111 ms time to first audio (6th of 32) among TTS systems, with 1.5% WER. Results cover the last 30 days. Last measured .

SpeechifyAI provides text-to-speech APIs and voice products.

Measured models
2
TTS
Best TTS model#6 / 32
111ms
Simba 3.0

Overview

SpeechifyAI's Simba line is versioned, with 3.0 and 3.2 both live for side-by-side comparison.

Every model below is measured daily on the same fixed inputs and ranked against the full field, never blended into a company score.

Model lineup

Text-to-Speech
Simba 3.2, Simba 3.0

Text-to-Speech

Full TTS dashboard

Ranked on Time to First Audio against 32 measured models.

Time to First Audioms · lower is better · SpeechifyAI models markedEvery measured TTS model on Time to First Audio, with SpeechifyAI's models highlighted.
  1. #1vui59 ms
  2. #2Default63 ms
  3. #3Qwen3 TTS Fast68 ms
  4. #4TTS Flash 291 ms
  5. #5Qwen3 TTS 1.7b107 ms
  6. #6Simba 3.0111 ms
  7. #7Palabra TTS120 ms
  8. #8Simba 3.2126 ms
leaders plus SpeechifyAI models · 24 other models in the full table
Word Error Rate% · lower is better · SpeechifyAI models markedEvery measured TTS model on Word Error Rate, with SpeechifyAI's models highlighted.
  1. #1Sonic 3.61.5%
  2. #2S2.1 Pro Free1.5%
  3. #3Simba 3.01.5%
  4. #4S2.1 Pro1.5%
  5. #5Lightning v3.1 Pro1.5%
  6. #6Sonic 3.51.5%
  7. #7Chirp 3 HD1.5%
  8. #23Simba 3.21.9%
leaders plus SpeechifyAI models · 24 other models in the full table
TTFA vs WER — SpeechifyAI vs every measured modelEach point is one measured TTS model · SpeechifyAI models highlighted · 30-day averagesTime to First Audio against Word Error Rate for every measured TTS model, with SpeechifyAI's models highlighted.
vui — 59 ms, 2.1%Default — 63 ms, 1.9%Qwen3 TTS Fast — 68 ms, 1.8%TTS Flash 2 — 91 ms, 1.7%Qwen3 TTS 1.7b — 107 ms, 1.8%Palabra TTS — 120 ms, 2.6%drama3-preview — 167 ms, 2.0%TTS 2 — 191 ms, 1.6%Flash v2.5 — 191 ms, 1.8%Eleven v4 Turbo — 201 ms, 1.7%Flux TTS — 205 ms, 1.7%TTS RT v1 — 254 ms, 2.4%TTS Rt v2 — 256 ms, 2.4%Mist v3 — 287 ms, 2.1%Phantom Z 3.4 conversational — 292 ms, 1.8%Sonic 3.5 — 293 ms, 1.5%Aura 2 — 297 ms, 1.8%Sonic 3.6 — 299 ms, 1.5%Falcon 2 — 300 ms, 1.7%Coda — 332 ms, 9.5%S2.1 Pro — 341 ms, 1.5%Grok TTS — 363 ms, 1.6%S1 — 389 ms, 1.8%Lightning v3.1 Pro — 392 ms, 1.5%Daytona TTS — 486 ms, 1.6%Aura 2 En — 569 ms, 2.1%Chirp 3 HD — 597 ms, 1.5%Qwen3 TTS Flash Realtime — 718 ms, 3.0%S2.1 Pro Free — 850 ms, 1.5%GPT-4o mini TTS — 2585 ms, 1.8%Simba 3.0 — 111 ms, 1.5%Simba 3.2 — 126 ms, 1.9%
Benchmarked models with their Time to First Audio over the last 30 days.
ModelHostTTFARank
Simba 3.2SpeechifyAI126 ms8th of 32
Simba 3.0SpeechifyAI111 ms6th of 32

How fast are SpeechifyAI's TTS models?

Simba 3.0 measures mean 111 ms time to first audio (6th of 32) among TTS systems. Last measured 2026-10-14. Simba 3.2 measures mean 126 ms time to first audio (8th of 32) among TTS systems. Last measured 2026-10-14.

How accurate are SpeechifyAI's TTS models?

Simba 3.0 measures 1.5% word error rate (3rd of 32) among TTS systems. Last measured 2026-10-14. Simba 3.2 measures 1.9% word error rate (23rd of 32) among TTS systems. Last measured 2026-10-14.

Which SpeechifyAI model is fastest?

Its fastest dated TTS result is Simba 3.0 at mean 111 ms time to first audio (6th of 32) among TTS systems, with 1.5% WER. Last measured 2026-10-14.

Limits of this comparison

Coval measures Simba 3.0 and Simba 3.2 as distinct first-party synthesis versions.

  • The benchmark does not rate voice preference, cloning fidelity or Speechify's consumer reading applications.

Official resources

Same datasets, prompts and metric definitions for every model, measured by Coval’s open-source runner. Full methodology on the overview.

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