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Text-to-Speech research benchmarks – Page 3 · SOTA2 Research

Text-to-Speech

Benchmarks

Dataset NameSOTA MethodSort

Dataset NameSOTA methodMetricTrendResultsLast Updated

LibriSpeech clean

3.46WER

12

Feb 26, 2026

Filtered MLS English (test)

3.96SMOS

12

Feb 26, 2026

Seed-TTS Seed-ZH (test)

1.02WER

11

Feb 26, 2026

Seed-TTS 24 kHz (test-zh)

0.762SIM-o

11

Feb 26, 2026

Seed-TTS en 24 kHz (test)

0.734SIM-o

11

Feb 26, 2026

ZTTS1-Eval In-The-Wild (ru)

Cartesia Sonic 3.5

3.75WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild (pt)

2.06WER

10

Jun 24, 2026

ZTTS In-The-Wild pl 1 (Eval)

4.66WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild ko

Gemini 3.1 Flash

2.27WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild (ja)

2.17WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild it

Gemini 3.1 Flash

2.08WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild fr

2.17WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild es

1.58WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild (de)

Qwen 3 TTS 1.7B

2.11WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild (zh)

Qwen 3 TTS 1.7B

0.99WER

10

Jun 24, 2026

ZTTS1-Eval In-The-Wild (en)

Qwen 3 TTS 1.7B

1.05WER

10

Jun 24, 2026

SEED (test-hard)

5.55CER

10

Jun 9, 2026

50 utterances (test)

97TTFP (ms)

10

Jun 1, 2026

CosyVoice zh 3 (test)

3.328UTMOS

10

May 12, 2026

CosyVoice en 3 (test)

3.931UTMOS

10

May 12, 2026

Seed-TTS-Eval Chinese

Ming-Flash Omni

0.87WER

10

Mar 27, 2026

LibriSpeech-PC Subset B (test-clean)

1.95WER

9

Jul 7, 2026

Difficult-Word Benchmark English 500 words

0.29D-PER

9

Jul 7, 2026

ZTTS1-Eval Clean 1.0 (test)

Qwen 3 TTS 1.7B

1.94WER (en)

9

Jun 24, 2026

ZTTS1-Eval In-The-Wild (train)

Cartesia Sonic 3.5

4.84WER

9

Jun 24, 2026

Page 3 of 13

Popular datasets

LibriSpeech Seed-TTS Multilingual LEMAS-TTS IndicTTS Database

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