2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Soniox STT (Async) leads on raw accuracy; Soniox STT (Async) is fastest; Ink-Whisper covers the most languages; Soniox STT (Async) is cheapest.
Verdict · who wins what
Most accurate
Soniox STT (Async)
8.7% WER
Soniox
Fastest
Soniox STT (Async)
0.1× realtime
Soniox
Most languages
Ink-Whisper
100 languages
Cartesia
Cheapest
Soniox STT (Async)
$0.0017/min
Soniox
Comparing
2 models · same benchmark
1
Ink-Whisper
Cartesia
Whisper rearchitected for real-time and batch voice AI — fastest TTCT, 99-language coverage
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.
Ink-Whisper
Soniox STT (Async)
field · 33 models
lower-left is better
general
legal
medical
noisy
technical
uk
us
Latency p99
947ms
6.2s
Final drain
164ms
—
Real-time factor
1.02×
—
Flicker
0.0%
—
Cadence
0.0/s
—
$10.08
1,000 hours
$133.20
$100.80
No
Auto-detect language
No
Yes
Live / streaming
Yes
No
Custom vocabulary
No
No
Max file size
No limit
No limit
Max duration
No limit
5 h
Compliance
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Is Ink-Whisper or Soniox STT (Async) more accurate?
Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 17.2% for Ink-Whisper, on our standardized benchmark.
Which is cheaper, Ink-Whisper or Soniox STT (Async)?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0022/min for Ink-Whisper.
Should you choose Ink-Whisper or Soniox STT (Async)?
Choose Ink-Whisper for language coverage; choose Soniox STT (Async) for accuracy, speed, and lower cost.
