Gradium TTS Beta
Leader Proprietary · Gradium
76.8
/100
Gradium TTS Beta is a proprietary text-to-speech (TTS) API from Gradium, measured by two independent benchmarks: Coval and Speko.
Voice agents Coval Speko
Benchmark
TTS APIs measured by Coval
31 text-to-speech (TTS) models, ranked from the highest benchmark score to the lowest, out of 100.
Data checked on September 30, 2026 · updated after each benchmark capture
Alibaba Qwen3 TTS Fast
Leader Open weights · Alibaba (Qwen)
73.7
/100
Alibaba Qwen3 TTS Fast is an open-weights text-to-speech (TTS) API from Alibaba (Qwen), served by Nari Labs, measured by two independent benchmarks: Coval and Speko.
Voice agents Coval Speko
Soniox TTS Real-Time v2
Leader Proprietary · Soniox
73.7
/100
Soniox TTS Real-Time v2 is a proprietary text-to-speech (TTS) API from Soniox, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Japanese
+12
Inworld Realtime TTS-2
Strong Proprietary · Inworld
68.8
/100
Inworld Realtime TTS-2 is a proprietary text-to-speech (TTS) API from Inworld, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+15
Inworld Realtime TTS-2 Flash
Strong Proprietary · Inworld
68.4
/100
Inworld Realtime TTS-2 Flash is a proprietary text-to-speech (TTS) API from Inworld, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+13
Gradium TTS (Aug 2026)
Strong Proprietary · Gradium
59.6
/100
Gradium TTS (Aug 2026) is a proprietary text-to-speech (TTS) API from Gradium, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+7
Palabra TTS v1
Strong Proprietary · Palabra
58.6
/100
Palabra TTS v1 is a proprietary text-to-speech (TTS) API from Palabra, measured by two independent benchmarks: Coval and Speko.
Voice agents Coval Speko
Cartesia Sonic 3.5
Strong Proprietary · Cartesia
58.5
/100
Cartesia Sonic 3.5 is a proprietary text-to-speech (TTS) API from Cartesia, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+18
Soniox TTS RT v1
Strong Proprietary · Soniox
57.2
/100
Soniox TTS RT v1 is a proprietary text-to-speech (TTS) API from Soniox, measured by two independent benchmarks: Coval and Speko.
Spanish German French Coval
+1
ElevenLabs Eleven v3 Conversational
Strong Proprietary · ElevenLabs
56.8
/100
ElevenLabs Eleven v3 Conversational is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+16
ElevenLabs Flash v2.5
Strong Proprietary · ElevenLabs
56.1
/100
ElevenLabs Flash v2.5 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+8
SpeechifyAI Simba 3.2
Contender Proprietary · Speechify
51.6
/100
SpeechifyAI Simba 3.2 is a proprietary text-to-speech (TTS) API from Speechify, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Knowledge sharing Assistants Entertainment Customer service
+3
Deepgram Flux TTS
Contender Proprietary · Deepgram
49.6
/100
Deepgram Flux TTS is a proprietary text-to-speech (TTS) API from Deepgram, measured by two independent benchmarks: Coval and Speko.
Coval Speko
Rime Coda
Contender Proprietary · Rime
47.1
/100
Rime Coda is a proprietary text-to-speech (TTS) API from Rime, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Korean Artificial Analysis Coval Speko
Fluxions vui
Contender Proprietary · Fluxions
47
/100
Fluxions vui is a proprietary text-to-speech (TTS) API from Fluxions, measured by one independent benchmark, Coval.
Voice agents Coval
Cartesia Sonic 3.6
Contender Proprietary · Cartesia
45.9
/100
Cartesia Sonic 3.6 is a proprietary text-to-speech (TTS) API from Cartesia, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+12
Alibaba Qwen3 TTS 1.7b
Contender Open weights · Alibaba (Qwen)
45.3
/100
Alibaba Qwen3 TTS 1.7b is an open-weights text-to-speech (TTS) API from Alibaba (Qwen), served by Baseten, measured by one independent benchmark, Coval.
Voice agents Coval
Rime Mist v3
Contender Proprietary · Rime
44.5
/100
Rime Mist v3 is a proprietary text-to-speech (TTS) API from Rime, measured by two independent benchmarks: Coval and Speko.
Coval Speko
SpaceXAI Grok TTS
Contender Proprietary · xAI
43
/100
SpaceXAI Grok TTS is a proprietary text-to-speech (TTS) API from xAI, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+14
Deepgram Aura 2
Contender Proprietary · Deepgram
42.8
/100
Deepgram Aura 2 is a proprietary text-to-speech (TTS) API from Deepgram, measured by two independent benchmarks: Coval and Speko.
Spanish German French Coval
+1
Smallest.ai Lightning V3.1 Pro (Jul 2026)
Contender Proprietary · Smallest.ai
41
/100
Smallest.ai Lightning V3.1 Pro (Jul 2026) is a proprietary text-to-speech (TTS) API from Smallest.ai, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Knowledge sharing Assistants Entertainment Customer service
+3
Deepdub Phantom Z 3.4 conversational
Listed Proprietary · Deepdub
33.9
/100
Deepdub Phantom Z 3.4 conversational is a proprietary text-to-speech (TTS) API from Deepdub, measured by one independent benchmark, Coval.
Coval
Fish Audio S2.1 Pro
Listed Proprietary · Fish Audio
33.2
/100
Fish Audio S2.1 Pro is a proprietary text-to-speech (TTS) API from Fish Audio, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Spanish German French Portuguese
+12
Fish Audio OpenAudio S1
Listed Proprietary · Fish Audio
28.7
/100
Fish Audio OpenAudio S1 is a proprietary text-to-speech (TTS) API from Fish Audio, measured by two independent benchmarks: Artificial Analysis and Coval.
Spanish German French Portuguese
+5
Murf AI Falcon 2
Listed Proprietary · Murf AI
28.4
/100
Murf AI Falcon 2 is a proprietary text-to-speech (TTS) API from Murf AI, measured by two independent benchmarks: Artificial Analysis and Coval.
Knowledge sharing Assistants Entertainment Customer service
+2
SpeechifyAI Simba 3.0
Listed Proprietary · Speechify
26
/100
SpeechifyAI Simba 3.0 is a proprietary text-to-speech (TTS) API from Speechify, measured by two independent benchmarks: Artificial Analysis and Coval.
Spanish German French Portuguese
+5
Google Chirp 3: HD
Listed Proprietary · Google
18.5
/100
Google Chirp 3: HD is a proprietary text-to-speech (TTS) API from Google, measured by two independent benchmarks: Artificial Analysis and Coval.
Japanese Hindi Tamil Telugu
+3
Deepgram Aura 2 En
Listed Proprietary · Deepgram
14.4
/100
Deepgram Aura 2 En is a proprietary text-to-speech (TTS) API from Deepgram, served by Cloudflare, measured by one independent benchmark, Coval.
Coval
OpenAI GPT-4o mini TTS
Listed Proprietary · OpenAI
14.4
/100
OpenAI GPT-4o mini TTS is a proprietary text-to-speech (TTS) API from OpenAI, measured by two independent benchmarks: Coval and Speko.
Spanish German French Japanese
+7
Fish Audio S2.1 Pro Free
Listed Proprietary · Fish Audio
6.1
/100
Fish Audio S2.1 Pro Free is a proprietary text-to-speech (TTS) API from Fish Audio, measured by one independent benchmark, Coval.
Coval
Alibaba Qwen3 TTS Flash Realtime
Listed Proprietary · Alibaba (Qwen)
4.3
/100
Alibaba Qwen3 TTS Flash Realtime is a proprietary text-to-speech (TTS) API from Alibaba (Qwen), measured by one independent benchmark, Coval.
Coval