Speech-to-Text

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

AssemblyAIUniversal-3.5 Pro66ms · 81ms

Sonioxstt-rt-v578ms · 96ms

CartesiaInk-2102ms · 151ms

DeepgramNova-3106ms · 138ms

InworldRealtime STT-1139ms · 158ms

Smallest AIPulse178ms · 196ms

ElevenLabsScribe v2 Realtime233ms · 323ms

xAIGrok STT305ms · 356ms

Gradium ASR334ms · 406ms

DeepgramFlux406ms · 1.19s

AlibabaQwen3-ASR424ms · 606ms

OpenAIGPT-4o-mini Transcribe460ms · 585ms

OpenAIGPT-4o Transcribe572ms · 800ms

GoogleChirp 3581ms · 882ms

GladiaSolaria-1596ms · 1.00s

ModulateVelma 21.11s · 1.42s

OpenAIGPT Live Transcribe1.12s · 1.95s

0ms300ms600ms900ms1.20s

p50 p90

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

$2.00

$2.50

$3.00

$3.30

$3.70

$4.50

$4.80

~$5.00

$5.40

$6.00

$6.50

$6.50

$7.50

$9.00

$10.40

$12.50

$16.00

$17.00

ModulateVelma 2Sonioxstt-rt-v5InworldRealtime STT-1OpenAIGPT-4o-mini TranscribexAIGrok STTElevenLabsScribe v2OpenAIGPT TranscribeDeepgramNova-3Smallest AIPulseAlibabaQwen3-ASROpenAIGPT-4o TranscribeDeepgramFluxElevenLabsScribe v2 RealtimeAssemblyAIUniversal-3.5 ProCartesiaInk-2Gradium ASRGladiaSolaria-1GoogleChirp 3OpenAIGPT Live Transcribe