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Speech-to-Text · Multilingual

Hindi

Language

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Benchmarks

X
Y
200ms400ms600ms800ms15.0%20.0%Finalize latency lower is betterWER lower is betterSoniox stt-rt-v5OpenAI GPT-4o-mini TranscribeAssemblyAI Universal-3.5 ProDeepgram Nova-3OpenAI GPT-4o Transcribespeko.ai/benchmarks

WER

lower is better

Share of words the transcript got wrong, batch path.

GoogleChirp 36.1%
AlibabaQwen3-ASRTry →9.8%
Sonioxstt-rt-v5Try →12.3%
OpenAIGPT-4o-mini TranscribeTry →12.7%
Smallest AISmallest AIPulse ProTry →13.4%
AssemblyAIAssemblyAIUniversal-3.5 ProTry →17.2%
DeepgramNova-3Try →20.3%
OpenAIGPT-4o TranscribeTry →21.0%
DeepgramNova-2Try →25.1%
CartesiaInk-WhisperTry →41.9%
0.0%10.0%20.0%30.0%40.0%50.0%

Finalize latency

lower is better

Time from the caller stopping to the finalized transcript, not the first partial — the agent cannot reply until it lands. Measured on English audio; Hindi has no sweep of its own yet.

DeepgramNova-3Try →189ms · 770ms
Sonioxstt-rt-v5Try →340ms · 1.33s
AssemblyAIAssemblyAIUniversal-3.5 ProTry →408ms · 908ms
OpenAIGPT-4o-mini TranscribeTry →822ms · 1.09s
OpenAIGPT-4o TranscribeTry →848ms · 1.18s
0ms300ms600ms900ms1.20s

p50 p90

Time to first token

lower is better

How long before the first word of the transcript arrives. Measured on English audio; Hindi has no sweep of its own yet.

DeepgramNova-3Try →976ms · 1.98s
AssemblyAIAssemblyAIUniversal-3.5 ProTry →1.01s · 1.51s
Sonioxstt-rt-v5Try →1.53s · 2.04s
OpenAIGPT-4o-mini TranscribeTry →6.33s · 10.6s
OpenAIGPT-4o TranscribeTry →6.40s · 10.8s
0ms2.00s4.00s6.00s8.00s

p50 p90

Cost

lower is better

$ per 1,000 minutes of audio · vendor list price, the same in every language

$2.00
$2.10
$3.00
$4.80
$6.00
$7.50
$16.00
Sonioxstt-rt-v5AlibabaQwen3-ASROpenAIGPT-4o-mini TranscribeDeepgramNova-3OpenAIGPT-4o TranscribeAssemblyAIAssemblyAIUniversal-3.5 ProGoogleChirp 3