TTS Bench — Speed — windows-cloning

Rig: windows-5090 — AMD Ryzen 9 9950X3D 16-Core Processor (16C) · NVIDIA GeForce RTX 5090 32GB · 126 GB RAM · Windows 11

Label: cloning · chris_hemsworth_15s — ref chris_hemsworth_15s.wav

TTFA = time to first audio (ms; lower is better). RTF = real-time factor (× realtime; higher is better; e.g. 10× means 10 sec of audio generated per 1 sec of compute). Cold = first run after process start; warm = subsequent runs.

Speed winners

Fastest (this cloning run): OmniVoice (cuda) — 9.75× warm RTF, 803ms warm TTFA

Model	Device	TTFA cold	TTFA warm	RTF cold	RTF warm	Peak RAM	Peak VRAM	Size
OmniVoice	cuda	1.20s	803ms	6.67×	9.75×	2.27 GB	2.42 GB	~1B
F5-TTS	cuda	1.56s	1.06s	3.75×	5.50×	2.67 GB	883 MB	330M
Coqui XTTS-v2	cuda	2.02s	1.51s	3.02×	4.76×	2.35 GB	2.10 GB	750M
Chatterbox Turbo	cuda	2.66s	1.59s	2.43×	4.15×	2.69 GB	3.33 GB	744M
Pocket-TTS	cpu	136ms	124ms	4.11×	4.10×	2.29 GB	—	100M
Qwen3-TTS 1.7B (CUDA-graph)	cuda	34.05s	25.83s	2.94×	3.89×	2.52 GB	4.95 GB	1.7B
NeuTTS Nano	cuda	738ms	305ms	1.79×	2.44×	3.22 GB	3.26 GB	748M
Chatterbox	cuda	4.01s	2.88s	1.63×	2.33×	3.02 GB	3.63 GB	1.2B
NeuTTS Nano	cpu	754ms	338ms	1.47×	1.90×	5.11 GB	—	748M
MOSS-TTS-Nano	cuda	5.59s	4.87s	1.34×	1.66×	2.42 GB	910 MB	100M
NeuTTS Air	cuda	1.16s	438ms	1.20×	1.64×	3.57 GB	3.26 GB	748M
IndexTTS-2	cpu	5.77s	4.87s	1.20×	1.47×	5.54 GB	—	1.5B
MOSS-TTS	cuda	5.44s	4.73s	1.31×	1.44×	2.10 GB	22.83 GB	8B
NeuTTS Air	cpu	1.22s	474ms	1.11×	1.34×	5.47 GB	—	748M
VoxCPM2 2B	cuda	6.36s	4.72s	0.96×	1.33×	2.49 GB	5.71 GB	2B
IndexTTS-2	cuda	6.80s	5.66s	1.03×	1.26×	4.05 GB	7.71 GB	1.5B
MOSS-TTS-Nano	cpu	5.69s	5.04s	1.16×	1.25×	3.05 GB	—	100M
Coqui XTTS-v2	cpu	9.93s	8.76s	0.84×	0.85×	3.43 GB	—	750M
Chatterbox Turbo	cpu	10.84s	9.37s	0.68×	0.71×	4.39 GB	—	744M
Qwen3-TTS 1.7B (1/5 ok)	cuda	4.37s	2.79s	0.49×	0.69×	2.42 GB	4.45 GB	1.7B
ZipVoice 123M (4/5 ok)	cuda	68.19s	105.99s	0.38×	0.60×	25.56 GB	53.24 GB	123M
Sesame CSM-1B	cuda	13.21s	11.46s	0.47×	0.55×	2.47 GB	3.54 GB	1B
Dia 1.6B	cuda	13.79s	11.45s	0.37×	0.50×	4.42 GB	4.82 GB	1.6B
ZipVoice 123M	cpu	50.03s	47.06s	0.30×	0.43×	39.66 GB	—	123M
VoxCPM2 2B	cpu	18.12s	16.04s	0.34×	0.39×	7.53 GB	—	2B
Chatterbox	cpu	17.39s	17.39s	0.36×	0.38×	4.72 GB	—	1.2B
Qwen3-TTS 1.7B (2/5 ok)	cpu	18.23s	18.32s	0.14×	0.16×	9.21 GB	—	1.7B
OmniVoice	cpu	54.74s	53.28s	0.14×	0.14×	3.98 GB	—	~1B
Sesame CSM-1B	cpu	48.90s	48.64s	0.12×	0.12×	6.32 GB	—	1B
Mars5-TTS	cpu	41.89s	43.23s	0.08×	0.10×	2.24 GB	—	1.2B
F5-TTS	cpu	71.35s	71.18s	0.08×	0.08×	2.71 GB	—	330M
Mars5-TTS	cuda	41.12s	39.53s	0.09×	0.07×	2.23 GB	7.23 GB	1.2B
LuxTTS	cpu	LuxTTS install failed (piper-phonemize has no Windows wheels)

Model

Device

TTFA cold

TTFA warm

RTF cold

RTF warm

Peak RAM

Peak VRAM

Size

OmniVoice

cuda

1.20s

803ms

6.67×

9.75×

2.27 GB

2.42 GB

~1B

F5-TTS

cuda

1.56s

1.06s

3.75×

5.50×

2.67 GB

883 MB

330M

Coqui XTTS-v2

cuda

2.02s

1.51s

3.02×

4.76×

2.35 GB

2.10 GB

750M

Chatterbox Turbo

cuda

2.66s

1.59s

2.43×

4.15×

2.69 GB

3.33 GB

744M

Pocket-TTS

cpu

136ms

124ms

4.11×

4.10×

2.29 GB

—

100M

Qwen3-TTS 1.7B (CUDA-graph)

cuda

34.05s

25.83s

2.94×

3.89×

2.52 GB

4.95 GB

1.7B

NeuTTS Nano

cuda

738ms

305ms

1.79×

2.44×

3.22 GB

3.26 GB

748M

Chatterbox

cuda

4.01s

2.88s

1.63×

2.33×

3.02 GB

3.63 GB

1.2B

NeuTTS Nano

cpu

754ms

338ms

1.47×

1.90×

5.11 GB

—

748M

MOSS-TTS-Nano

cuda

5.59s

4.87s

1.34×

1.66×

2.42 GB

910 MB

100M

NeuTTS Air

cuda

1.16s

438ms

1.20×

1.64×

3.57 GB

3.26 GB

748M

IndexTTS-2

cpu

5.77s

4.87s

1.20×

1.47×

5.54 GB

—

1.5B

MOSS-TTS

cuda

5.44s

4.73s

1.31×

1.44×

2.10 GB

22.83 GB

NeuTTS Air

cpu

1.22s

474ms

1.11×

1.34×

5.47 GB

—

748M

VoxCPM2 2B

cuda

6.36s

4.72s

0.96×

1.33×

2.49 GB

5.71 GB

IndexTTS-2

cuda

6.80s

5.66s

1.03×

1.26×

4.05 GB

7.71 GB

1.5B

MOSS-TTS-Nano

cpu

5.69s

5.04s

1.16×

1.25×

3.05 GB

—

100M

Coqui XTTS-v2

cpu

9.93s

8.76s

0.84×

0.85×

3.43 GB

—

750M

Chatterbox Turbo

cpu

10.84s

9.37s

0.68×

0.71×

4.39 GB

—

744M

Qwen3-TTS 1.7B (1/5 ok)

cuda

4.37s

2.79s

0.49×

0.69×

2.42 GB

4.45 GB

1.7B

ZipVoice 123M (4/5 ok)

cuda

68.19s

105.99s

0.38×

0.60×

25.56 GB

53.24 GB

123M

Sesame CSM-1B

cuda

13.21s

11.46s

0.47×

0.55×

2.47 GB

3.54 GB

Dia 1.6B

cuda

13.79s

11.45s

0.37×

0.50×

4.42 GB

4.82 GB

1.6B

ZipVoice 123M

cpu

50.03s

47.06s

0.30×

0.43×

39.66 GB

—

123M

VoxCPM2 2B

cpu

18.12s

16.04s

0.34×

0.39×

7.53 GB

—

Chatterbox

cpu

17.39s

0.36×

0.38×

4.72 GB

—

1.2B

Qwen3-TTS 1.7B (2/5 ok)

cpu

18.23s

18.32s

0.14×

0.16×

9.21 GB

—

1.7B

OmniVoice

cpu

54.74s

53.28s

0.14×

3.98 GB

—

~1B

Sesame CSM-1B

cpu

48.90s

48.64s

0.12×

6.32 GB

—

Mars5-TTS

cpu

41.89s

43.23s

0.08×

0.10×

2.24 GB

—

1.2B

F5-TTS

cpu

71.35s

71.18s

0.08×

2.71 GB

—

330M

Mars5-TTS

cuda

41.12s

39.53s

0.09×

0.07×

2.23 GB

7.23 GB

1.2B

LuxTTS

cpu

LuxTTS install failed (piper-phonemize has no Windows wheels)