2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Soniox STT (Async) leads on raw accuracy; Gemini 3.5 Transcribe is fastest; Gemini 3.5 Transcribe covers the most languages; Soniox STT (Async) is cheapest.
Verdict · who wins what
Most accurate
Soniox STT (Async)
8.7% WER
Soniox
Fastest
Gemini 3.5 Transcribe
1.0× realtime
Google Gemini
Most languages
Gemini 3.5 Transcribe
72 languages
Google Gemini
Cheapest
Soniox STT (Async)
$0.0017/min
Soniox
Comparing
2 models · same benchmark
1
Gemini 3.5 Transcribe
Google Gemini
Google Gemini batch transcription with word timestamps, optional speaker labels and custom vocabulary.
2
Soniox STT (Async)
Soniox
Soniox async batch transcription — one multilingual model across 60+ languages with speaker diarization, per-word timestamps, and automatic language identification, at a low flat token-based rate.
general
legal
medical
noisy
technical
uk
us
Latency p99
5.1s
6.2s
$10.08
1,000 hours
$302.40
$100.80
No
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
Yes
No
Max file size
No limit
No limit
Max duration
30 min
5 h
Compliance
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Is Gemini 3.5 Transcribe or Soniox STT (Async) more accurate?
Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 10.4% for Gemini 3.5 Transcribe, on our standardized benchmark.
Which is cheaper, Gemini 3.5 Transcribe or Soniox STT (Async)?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0050/min for Gemini 3.5 Transcribe.
Should you choose Gemini 3.5 Transcribe or Soniox STT (Async)?
Choose Gemini 3.5 Transcribe for speed and language coverage; choose Soniox STT (Async) for accuracy and lower cost.
