Text-to-Speech Benchmark
How clearly, how fast, and how naturally each system turns text into speech — measured by automated models and signal analysis, no listener panels.
RankingsVoice AgentSorted by highest Ensemble-MOS
7 METRICS · CLICK HEADER TO SORT · SWIPE TO EXPLORE
RANKSYSTEM / MODELRECOMMENDED FOR
1
ElevenLabs
eleven-v3
2026-06-19 · #512
Voice AgentConversational AIReal-time
2
OpenAI
gpt-4o-mini-tts
2026-06-19 · #512
AudiobookLong-form NarrationDubbing
3
Google
gemini-3.1-flash-tts
2026-06-19 · #512
PodcastVideo DubbingContent Creation
4
Cartesia
sonic-3
2026-06-19 · #512
E-learningCorporate TrainingNarration
5
Fish Audio
s2-pro
2026-06-19 · #512
Edge DeploymentOn-premiseLow-latency
Ensemble-MOS
↑ higher is better4.6EXCELLENT
4.5EXCELLENT
4.2GOOD
4.0GOOD
3.4FAIR
Native-dist
↓ lower is better0.024
0.031
0.038
0.052
0.081
Hard-text %
↑ higher is better99.2%
98.5%
97.8%
94.1%
88.0%
Heteronym Acc.
↑ higher is better92%
95%
88%
83%
74%
TTFB p50
↓ lower is better120msFAST
105–138ms188msFAST
170–210ms145msFAST
128–165ms320ms
295–348ms85msFAST
74–98msSSML Support
↑ higher is better✓ Supported
✓ Supported
✓ Supported1 tag leak
✓ Supported
✗ Not Supported3 tag leaks
Question F0
↑ higher is better88%
76%
71%
68%
52%