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Speech-to-Text

WER

Route
ElevenLabsScribe v2 Realtime9.6%
AssemblyAIAssemblyAIUniversal-3.5 Pro10.4%
Smallest AISmallest AIPulse11.0%
OpenAIGPT Live Transcribe11.3%
xAIGrok STT11.3%
MetaMetaMuse Voice Transcribe11.7%
InworldInworldRealtime STT-111.8%
AlibabaQwen3-ASR12.2%
ModulateModulateVelma 212.3%
CartesiaInk-212.5%
GoogleGemini 3.5 Transcribe Live13.1%
Sonioxstt-rt-v513.1%
OpenAIGPT Transcribe15.1%
DeepgramNova-315.1%
GoogleChirp 317.3%
DeepgramFlux17.8%
GladiaSolaria-118.2%
OpenAIGPT-4o-mini Transcribe18.5%
GradiumASR22.9%
OpenAIGPT-4o Transcribe31.9%
0.0%10.0%20.0%30.0%40.0%

Finalize latency

Region

Time from the caller stopping to the finalized transcript, not the first partial — the agent cannot reply until it lands.

DeepgramNova-3189ms · 770ms
MetaMetaMuse Voice Transcribe240ms · 534ms
Sonioxstt-rt-v5340ms · 1.33s
AssemblyAIAssemblyAIUniversal-3.5 Pro408ms · 908ms
CartesiaInk-2587ms · 989ms
InworldInworldRealtime STT-1670ms · 1.16s
DeepgramFlux712ms · 1.31s
OpenAIGPT-4o-mini Transcribe822ms · 1.09s
OpenAIGPT Transcribe824ms · 1.16s
Smallest AISmallest AIPulse839ms · 1.08s
OpenAIGPT-4o Transcribe848ms · 1.18s
AlibabaQwen3-ASR889ms · 1.21s
GladiaSolaria-1910ms · 3.10s
xAIGrok STT1.13s · 1.36s
GradiumASR1.13s · 1.34s
ModulateModulateVelma 21.21s · 1.41s
OpenAIGPT Live Transcribe1.23s · 2.29s
GoogleGemini 3.5 Transcribe Live1.28s · 1.54s
ElevenLabsScribe v2 Realtime1.75s · 1.98s
0ms300ms600ms900ms1.20s

p50 p90

Time to first token

Region
DeepgramFlux811ms · 1.49s
DeepgramNova-3976ms · 1.98s
AssemblyAIAssemblyAIUniversal-3.5 Pro1.01s · 1.51s
xAIGrok STT1.03s · 2.01s
InworldInworldRealtime STT-11.32s · 1.92s
ModulateModulateVelma 21.48s · 1.49s
Sonioxstt-rt-v51.53s · 2.04s
GladiaSolaria-11.61s · 3.65s
MetaMetaMuse Voice Transcribe1.62s · 2.23s
OpenAIGPT Live Transcribe1.73s · 2.23s
CartesiaInk-21.78s · 2.40s
GoogleGemini 3.5 Transcribe Live1.80s · 2.30s
ElevenLabsScribe v2 Realtime2.22s · 2.36s
Smallest AISmallest AIPulse2.27s · 2.32s
GradiumASR2.44s · 2.95s
OpenAIGPT-4o-mini Transcribe6.33s · 10.6s
OpenAIGPT-4o Transcribe6.40s · 10.8s
OpenAIGPT Transcribe6.51s · 10.7s
AlibabaQwen3-ASR6.81s · 7.50s
0ms2.00s4.00s6.00s8.00s

p50 p90

Cost

lower is better

What a vendor charges to transcribe a thousand minutes of audio, at its published streaming rate.

$0.00$5.00$10.00$15.00$20.00
$1.00
$1.70
$2.00
$2.50
$3.00
$3.00
$3.30
$3.70
$4.50
$4.80
~$5.00
$5.40
$6.00
$6.50
$6.50
$7.50
$9.00
~$9.00
$10.40
$12.50
$16.00
$17.00
ModulateModulateVelma 2MMicrosoftMAI-Transcribe-2Sonioxstt-rt-v5InworldInworldRealtime STT-1OpenAIGPT-4o-mini TranscribeMetaMetaMuse Voice TranscribexAIGrok STTElevenLabsScribe v2OpenAIGPT TranscribeDeepgramNova-3Smallest AISmallest AIPulseAlibabaQwen3-ASROpenAIGPT-4o TranscribeDeepgramFluxElevenLabsScribe v2 RealtimeAssemblyAIAssemblyAIUniversal-3.5 ProCartesiaInk-2GoogleGemini 3.5 Transcribe LiveGradiumASRGladiaSolaria-1GoogleChirp 3OpenAIGPT Live Transcribe