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). RTFx = realtime speed (× 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): StyleTTS 2 (cuda) — 41.66× warm RTFx, 212ms warm TTFA

Model	Device	TTFA cold	TTFA warm	RTFx cold	RTFx warm	Peak RAM	Peak VRAM	Size	Released
StyleTTS 2	cuda	1.66s	212ms	5.45×	41.66×	2.63 GB	1.52 GB	~148M	Jun 2023
StyleTTS 2	cpu	1.70s	218ms	5.27×	40.62×	2.63 GB	—	~148M	Jun 2023
OpenVoice v2	cuda	1.72s	361ms	3.61×	16.73×	2.65 GB	1.35 GB	~100M	Apr 2024
Sopro V2 Turbo	cuda	738ms	558ms	10.31×	14.41×	2.46 GB	993 MB	120M	Aug 2026
Audio8 TTS 0.6B (compiled)	cuda	1.13s	610ms	6.09×	11.69×	2.48 GB	2.71 GB	601M	Aug 2026
OmniVoice	cuda	1.20s	803ms	6.67×	9.75×	2.27 GB	2.42 GB	~1B	Mar 2026
Sopro V2 Turbo (streaming)	cuda	228ms	120ms	7.77×	9.55×	2.48 GB	1.22 GB	120M	Aug 2026
MiraTTS	cuda	2.14s	1.46s	4.76×	7.01×	3.58 GB	1.28 GB	0.5B	Dec 2025
LongCat-AudioDiT 1B	cuda	1.66s	1.36s	4.72×	5.67×	2.36 GB	5.78 GB	1.42B	Mar 2026
F5-TTS v1	cuda	1.56s	1.06s	3.75×	5.50×	2.67 GB	883 MB	330M	Oct 2024
Coqui XTTS-v2	cuda	2.02s	1.51s	3.02×	4.76×	2.35 GB	2.10 GB	750M	Oct 2023
OpenVoice v2	cpu	2.60s	1.44s	2.23×	4.25×	2.78 GB	—	~100M	Apr 2024
Chatterbox Turbo	cuda	2.66s	1.59s	2.43×	4.15×	2.69 GB	3.33 GB	744M	Dec 2025
Pocket-TTS	cpu	136ms	124ms	4.11×	4.10×	2.29 GB	—	100M	Jan 2026
Qwen3-TTS 1.7B (CUDA-graph)	cuda	7.93s	1.57s	0.83×	3.66×	2.61 GB	4.89 GB	1.7B	Jan 2026
LongCat-AudioDiT 3.5B	cuda	2.59s	2.32s	3.13×	3.49×	2.26 GB	15.14 GB	3.83B	Mar 2026
Echo-TTS	cuda	2.84s	2.23s	2.62×	3.39×	1.94 GB	9.38 GB	2.8B	Dec 2025
Chatterbox	cuda	4.01s	2.88s	1.63×	2.33×	3.02 GB	3.63 GB	1.2B	Apr 2025
DramaBox	cuda	6.46s	4.99s	1.66×	2.14×	2.45 GB	17.39 GB	3.3B	Apr 2026
WavTTS 0.67B	cuda	3.16s	2.84s	1.85×	2.08×	2.00 GB	1.44 GB	0.67B	May 2026
NeuTTS Nano	cuda	854ms	331ms	1.60×	2.00×	2.59 GB	3.26 GB	229M	Dec 2025
Sopro V2 Turbo	cpu	4.45s	4.46s	1.76×	1.73×	1.41 GB	—	120M	Aug 2026
Sopro V2 Turbo (streaming)	cpu	888ms	816ms	1.67×	1.69×	1.59 GB	—	120M	Aug 2026
MOSS-TTS-Nano	cuda	5.59s	4.87s	1.34×	1.66×	2.42 GB	910 MB	100M	Apr 2026
VibeVoice 7B	cuda	5.22s	4.86s	1.41×	1.58×	2.04 GB	17.63 GB	7B	Sep 2025
NeuTTS Nano	cpu	863ms	387ms	1.23×	1.58×	5.12 GB	—	229M	Dec 2025
IndexTTS-2	cpu	5.77s	4.87s	1.20×	1.47×	5.54 GB	—	1.5B	Jun 2025
MOSS-TTS v1.0	cuda	5.44s	4.73s	1.31×	1.44×	2.10 GB	22.83 GB	8B	Feb 2026
VoxCPM2 2B	cuda	6.36s	4.72s	0.96×	1.33×	2.49 GB	5.71 GB	2B	Apr 2026
NeuTTS Air	cuda	1.46s	492ms	0.88×	1.30×	2.96 GB	3.26 GB	748M	Sep 2025
IndexTTS-2	cuda	6.80s	5.66s	1.03×	1.26×	4.05 GB	7.71 GB	1.5B	Jun 2025
MOSS-TTS-Nano	cpu	5.69s	5.04s	1.16×	1.25×	3.05 GB	—	100M	Apr 2026
MOSS-TTS v1.5	cuda	5.88s	5.28s	1.14×	1.24×	2.36 GB	22.83 GB	8B	May 2026
NeuTTS Air	cpu	1.75s	568ms	0.75×	0.96×	5.47 GB	—	748M	Sep 2025
Fish Speech 1.5	cuda	8.04s	8.21s	0.85×	0.95×	3.82 GB	1.76 GB	~500M	Nov 2024
Coqui XTTS-v2	cpu	9.93s	8.76s	0.84×	0.85×	3.43 GB	—	750M	Oct 2023
Zonos v0.1	cuda	10.36s	9.85s	0.67×	0.73×	6.55 GB	4.45 GB	1.6B	Feb 2025
Audio8 TTS Preview 0.6B	cuda	13.33s	10.65s	0.58×	0.73×	3.01 GB	2.75 GB	601M	Jul 2026
Chatterbox Turbo	cpu	10.84s	9.37s	0.68×	0.71×	4.39 GB	—	744M	Dec 2025
ZipVoice 123M (4/5 ok)	cuda	68.19s	105.99s	0.38×	0.60×	25.56 GB	53.24 GB	123M	Jun 2025
Sesame CSM-1B	cuda	13.21s	11.46s	0.47×	0.55×	2.47 GB	3.54 GB	1B	Mar 2025
Dia 1.6B-0626	cuda	14.04s	11.22s	0.33×	0.47×	8.53 GB	4.82 GB	1.6B	Jun 2025
Breeze TTS 2	cuda	1.22s	400ms	0.43×	0.45×	2.45 GB	7.62 GB	3.47B	Aug 2026
Audio8 TTS Preview 0.1B	cuda	20.61s	17.58s	0.35×	0.45×	2.93 GB	1.86 GB	170M	Aug 2026
ZipVoice 123M	cpu	50.03s	47.06s	0.30×	0.43×	39.66 GB	—	123M	Jun 2025
VoxCPM2 2B	cpu	18.12s	16.04s	0.34×	0.39×	7.53 GB	—	2B	Apr 2026
Chatterbox	cpu	17.39s	17.39s	0.36×	0.38×	4.72 GB	—	1.2B	Apr 2025
Miso TTS 8B	cuda	37.67s	32.57s	0.30×	0.32×	2.07 GB	16.55 GB	8.2B	May 2026
OuteTTS 1.0 1B	cuda	18.32s	17.44s	0.30×	0.30×	3.64 GB	3.56 GB	1B	Apr 2025
Audio8 TTS Preview 0.1B	cpu	38.30s	37.62s	0.18×	0.19×	4.59 GB	—	170M	Aug 2026
Fish Speech 1.5	cpu	37.45s	42.66s	0.18×	0.18×	4.43 GB	—	~500M	Nov 2024
Audio8 TTS Preview 0.6B	cpu	47.09s	45.60s	0.15×	0.16×	6.64 GB	—	601M	Jul 2026
OmniVoice	cpu	54.74s	53.28s	0.14×	0.14×	3.98 GB	—	~1B	Mar 2026
Zonos v0.1	cpu	61.60s	60.84s	0.12×	0.12×	8.57 GB	—	1.6B	Feb 2025
Sesame CSM-1B	cpu	48.90s	48.64s	0.12×	0.12×	6.32 GB	—	1B	Mar 2025
Mars5-TTS	cpu	41.89s	43.23s	0.08×	0.10×	2.24 GB	—	1.2B	Jun 2024
F5-TTS v1	cpu	71.35s	71.18s	0.08×	0.08×	2.71 GB	—	330M	Oct 2024
Mars5-TTS	cuda	41.12s	39.53s	0.09×	0.07×	2.23 GB	7.23 GB	1.2B	Jun 2024
LuxTTS	cpu	LuxTTS install failed (piper-phonemize has no Windows wheels)

Model

Device

TTFA cold

TTFA warm

RTFx cold

RTFx warm

Peak RAM

Peak VRAM

Size

Released

StyleTTS 2

cuda

1.66s

212ms

5.45×

41.66×

2.63 GB

1.52 GB

~148M

Jun 2023

StyleTTS 2

cpu

1.70s

218ms

5.27×

40.62×

2.63 GB

—

~148M

Jun 2023

OpenVoice v2

cuda

1.72s

361ms

3.61×

16.73×

2.65 GB

1.35 GB

~100M

Apr 2024

Sopro V2 Turbo

cuda

738ms

558ms

10.31×

14.41×

2.46 GB

993 MB

120M

Aug 2026

Audio8 TTS 0.6B (compiled)

cuda

1.13s

610ms

6.09×

11.69×

2.48 GB

2.71 GB

601M

Aug 2026

OmniVoice

cuda

1.20s

803ms

6.67×

9.75×

2.27 GB

2.42 GB

~1B

Mar 2026

Sopro V2 Turbo (streaming)

cuda

228ms

120ms

7.77×

9.55×

2.48 GB

1.22 GB

120M

Aug 2026

MiraTTS

cuda

2.14s

1.46s

4.76×

7.01×

3.58 GB

1.28 GB

0.5B

Dec 2025

LongCat-AudioDiT 1B

cuda

1.66s

1.36s

4.72×

5.67×

2.36 GB

5.78 GB

1.42B

Mar 2026

F5-TTS v1

cuda

1.56s

1.06s

3.75×

5.50×

2.67 GB

883 MB

330M

Oct 2024

Coqui XTTS-v2

cuda

2.02s

1.51s

3.02×

4.76×

2.35 GB

2.10 GB

750M

Oct 2023

OpenVoice v2

cpu

2.60s

1.44s

2.23×

4.25×

2.78 GB

—

~100M

Apr 2024

Chatterbox Turbo

cuda

2.66s

1.59s

2.43×

4.15×

2.69 GB

3.33 GB

744M

Dec 2025

Pocket-TTS

cpu

136ms

124ms

4.11×

4.10×

2.29 GB

—

100M

Jan 2026

Qwen3-TTS 1.7B (CUDA-graph)

cuda

7.93s

1.57s

0.83×

3.66×

2.61 GB

4.89 GB

1.7B

Jan 2026

LongCat-AudioDiT 3.5B

cuda

2.59s

2.32s

3.13×

3.49×

2.26 GB

15.14 GB

3.83B

Mar 2026

Echo-TTS

cuda

2.84s

2.23s

2.62×

3.39×

1.94 GB

9.38 GB

2.8B

Dec 2025

Chatterbox

cuda

4.01s

2.88s

1.63×

2.33×

3.02 GB

3.63 GB

1.2B

Apr 2025

DramaBox

cuda

6.46s

4.99s

1.66×

2.14×

2.45 GB

17.39 GB

3.3B

Apr 2026

WavTTS 0.67B

cuda

3.16s

2.84s

1.85×

2.08×

2.00 GB

1.44 GB

0.67B

May 2026

NeuTTS Nano

cuda

854ms

331ms

1.60×

2.00×

2.59 GB

3.26 GB

229M

Dec 2025

Sopro V2 Turbo

cpu

4.45s

4.46s

1.76×

1.73×

1.41 GB

—

120M

Aug 2026

Sopro V2 Turbo (streaming)

cpu

888ms

816ms

1.67×

1.69×

1.59 GB

—

120M

Aug 2026

MOSS-TTS-Nano

cuda

5.59s

4.87s

1.34×

1.66×

2.42 GB

910 MB

100M

Apr 2026

VibeVoice 7B

cuda

5.22s

4.86s

1.41×

1.58×

2.04 GB

17.63 GB

Sep 2025

NeuTTS Nano

cpu

863ms

387ms

1.23×

1.58×

5.12 GB

—

229M

Dec 2025

IndexTTS-2

cpu

5.77s

4.87s

1.20×

1.47×

5.54 GB

—

1.5B

Jun 2025

MOSS-TTS v1.0

cuda

5.44s

4.73s

1.31×

1.44×

2.10 GB

22.83 GB

Feb 2026

VoxCPM2 2B

cuda

6.36s

4.72s

0.96×

1.33×

2.49 GB

5.71 GB

Apr 2026

NeuTTS Air

cuda

1.46s

492ms

0.88×

1.30×

2.96 GB

3.26 GB

748M

Sep 2025

IndexTTS-2

cuda

6.80s

5.66s

1.03×

1.26×

4.05 GB

7.71 GB

1.5B

Jun 2025

MOSS-TTS-Nano

cpu

5.69s

5.04s

1.16×

1.25×

3.05 GB

—

100M

Apr 2026

MOSS-TTS v1.5

cuda

5.88s

5.28s

1.14×

1.24×

2.36 GB

22.83 GB

May 2026

NeuTTS Air

cpu

1.75s

568ms

0.75×

0.96×

5.47 GB

—

748M

Sep 2025

Fish Speech 1.5

cuda

8.04s

8.21s

0.85×

0.95×

3.82 GB

1.76 GB

~500M

Nov 2024

Coqui XTTS-v2

cpu

9.93s

8.76s

0.84×

0.85×

3.43 GB

—

750M

Oct 2023

Zonos v0.1

cuda

10.36s

9.85s

0.67×

0.73×

6.55 GB

4.45 GB

1.6B

Feb 2025

Audio8 TTS Preview 0.6B

cuda

13.33s

10.65s

0.58×

0.73×

3.01 GB

2.75 GB

601M

Jul 2026

Chatterbox Turbo

cpu

10.84s

9.37s

0.68×

0.71×

4.39 GB

—

744M

Dec 2025

ZipVoice 123M (4/5 ok)

cuda

68.19s

105.99s

0.38×

0.60×

25.56 GB

53.24 GB

123M

Jun 2025

Sesame CSM-1B

cuda

13.21s

11.46s

0.47×

0.55×

2.47 GB

3.54 GB

Mar 2025

Dia 1.6B-0626

cuda

14.04s

11.22s

0.33×

0.47×

8.53 GB

4.82 GB

1.6B

Jun 2025

Breeze TTS 2

cuda

1.22s

400ms

0.43×

0.45×

2.45 GB

7.62 GB

3.47B

Aug 2026

Audio8 TTS Preview 0.1B

cuda

20.61s

17.58s

0.35×

0.45×

2.93 GB

1.86 GB

170M

Aug 2026

ZipVoice 123M

cpu

50.03s

47.06s

0.30×

0.43×

39.66 GB

—

123M

Jun 2025

VoxCPM2 2B

cpu

18.12s

16.04s

0.34×

0.39×

7.53 GB

—

Apr 2026

Chatterbox

cpu

17.39s

0.36×

0.38×

4.72 GB

—

1.2B

Apr 2025

Miso TTS 8B

cuda

37.67s

32.57s

0.30×

0.32×

2.07 GB

16.55 GB

8.2B

May 2026

OuteTTS 1.0 1B

cuda

18.32s

17.44s

0.30×

3.64 GB

3.56 GB

Apr 2025

Audio8 TTS Preview 0.1B

cpu

38.30s

37.62s

0.18×

0.19×

4.59 GB

—

170M

Aug 2026

Fish Speech 1.5

cpu

37.45s

42.66s

0.18×

4.43 GB

—

~500M

Nov 2024

Audio8 TTS Preview 0.6B

cpu

47.09s

45.60s

0.15×

0.16×

6.64 GB

—

601M

Jul 2026

OmniVoice

cpu

54.74s

53.28s

0.14×

3.98 GB

—

~1B

Mar 2026

Zonos v0.1

cpu

61.60s

60.84s

0.12×

8.57 GB

—

1.6B

Feb 2025

Sesame CSM-1B

cpu

48.90s

48.64s

0.12×

6.32 GB

—

Mar 2025

Mars5-TTS

cpu

41.89s

43.23s

0.08×

0.10×

2.24 GB

—

1.2B

Jun 2024

F5-TTS v1

cpu

71.35s

71.18s

0.08×

2.71 GB

—

330M

Oct 2024

Mars5-TTS

cuda

41.12s

39.53s

0.09×

0.07×

2.23 GB

7.23 GB

1.2B

Jun 2024

LuxTTS

cpu

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