Text-to-speech · registry

Reported MOS is metadata, not a measured leaderboard.

This page keeps vendor, paper, community, and CodeSOTA-measured rows visible in one registry. It avoids assigning a strict rank to reported MOS and flags sub-0.1 MOS gaps as noise.

Measured leaderboard Watchlist Vote on TTS Elo

Model	Type	Evidence tier	MOS	MOS interpretation	Source	Deployment	License	Capabilities
Gradium TTS Gradium · 2026 · —	API	codesota measured	4.4	reported gap >= 0.1 from top	CodeSOTA measured no CI yet; measured run exposes sample count and artifacts	api	provider terms	streaming · cloning · voice design
Kokoro v1.0 Hexgrad · 2025 · 82M	open	codesota measured	4.5	reported gap >= 0.1 from top	CodeSOTA measured no CI yet; measured run exposes sample count and artifacts	local, edge	Apache-2.0	streaming
Fish Audio S2 Pro Fish Audio · 2026 · 5B	open	paper reported	4.6	reported gap >= 0.1 from top	paper reported reported MOS; no CodeSOTA CI	local, edge, browser	fish-audio-research-license	streaming · cloning · voice design · code-switching
Supertonic 3 Supertone · 2026 · 99M	open	community reported	4.2	reported gap >= 0.1 from top	community reported reported MOS; no CodeSOTA CI	local, edge, browser	OpenRAIL-M	cloning · voice design · code-switching
Sesame CSM Sesame · 2025 · 1B+	open	community reported	4.7	within MOS noise	community reported reported MOS; no CodeSOTA CI	local	Apache-2.0	voice design
Gemini 2.5 Pro TTS Google · 2025 · —	API	vendor reported	4.7	within MOS noise	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · voice design · code-switching
Cartesia Sonic 2 Cartesia · 2025 · —	API	vendor reported	4.7	within MOS noise	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · cloning · voice design
ElevenLabs Flash v2.5 ElevenLabs · 2025 · —	API	vendor reported	4.6	reported gap >= 0.1 from top	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · cloning · voice design · code-switching
PlayHT 3.0 PlayHT · 2025 · —	API	vendor reported	4.6	reported gap >= 0.1 from top	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · cloning · voice design
Orpheus TTS Canopy Labs · 2025 · 3B	open	community reported	4.6	reported gap >= 0.1 from top	community reported reported MOS; no CodeSOTA CI	local	Apache-2.0	cloning · voice design
Gemini 2.5 Flash TTS Google · 2025 · —	API	vendor reported	4.5	reported gap >= 0.1 from top	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · voice design · code-switching
Google Chirp 3 HD Google · 2025 · —	API	vendor reported	4.4	reported gap >= 0.1 from top	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · cloning · voice design · code-switching
Fish Speech 1.5 Fish Audio · 2025 · 500M	open	community reported	4.4	reported gap >= 0.1 from top	community reported reported MOS; no CodeSOTA CI	local	Apache-2.0	cloning · code-switching
Dia 1.6B Nari Labs · 2025 · 1.6B	open	community reported	4.3	reported gap >= 0.1 from top	community reported reported MOS; no CodeSOTA CI	local	Apache-2.0	cloning · voice design
Spark-TTS SparkAudio · 2025 · 500M	open	community reported	4.3	reported gap >= 0.1 from top	community reported reported MOS; no CodeSOTA CI	local	Apache-2.0	cloning · voice design · code-switching
Parler-TTS Hugging Face · 2025 · 880M	open	paper reported	4.1	reported gap >= 0.1 from top	paper reported reported MOS; no CodeSOTA CI	local	Apache-2.0	voice design
ElevenLabs Turbo v2.5 ElevenLabs · 2024 · —	API	vendor reported	4.8	within MOS noise	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming · cloning · voice design · code-switching
XTTS v2 Coqui · 2024 · 467M	open	paper reported	4.5	reported gap >= 0.1 from top	paper reported reported MOS; no CodeSOTA CI	local	CPML	cloning · code-switching
F5-TTS Shanghai AI Lab · 2024 · 335M	open	paper reported	4.4	reported gap >= 0.1 from top	paper reported reported MOS; no CodeSOTA CI	local	MIT	cloning · code-switching
OpenAI TTS HD OpenAI · 2023 · —	API	vendor reported	4.7	within MOS noise	vendor reported reported MOS; no CodeSOTA CI	api	provider terms	streaming
Piper Rhasspy · 2023 · ~20M	open	community reported	3.6	reported gap >= 0.1 from top	community reported reported MOS; no CodeSOTA CI	local, edge	MIT	streaming