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; Soniox STT (Async) 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
Soniox STT (Async)
25 languages
Soniox
Cheapest
Soniox STT (Async)
$0.0017/min
Soniox
Comparing
2 models · same benchmark
1
Universal Streaming Multilingual
AssemblyAI
Multilingual streaming STT — English, Spanish, French, German, Italian, Portuguese
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
—
—
6.2s
Final drain
791ms
—
Real-time factor
1.03×
—
Flicker
2.8%
—
Cadence
3.0/s
—
$10.08
1,000 hours
$151.20
$100.80
No
Auto-detect language
No
Yes
Live / streaming
Yes
No
Custom vocabulary
No
No
Max file size
5 GB
No limit
Max duration
10 h
5 h
Compliance
—
Is Universal Streaming Multilingual or Soniox STT (Async) more accurate?
Soniox STT (Async) has a published benchmark at 8.7% word error rate. Universal Streaming Multilingual has not been benchmarked yet.
Which is cheaper, Universal Streaming Multilingual or Soniox STT (Async)?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0025/min for Universal Streaming Multilingual.
Should you choose Universal Streaming Multilingual or Soniox STT (Async)?
Soniox STT (Async) is the stronger choice overall, leading on accuracy, speed, lower cost, and language coverage.
