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
Nova-2 Conversational AI
Deepgram
Optimized for human-to-bot interactions (IVR, voice assistants)
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.
Nova-2 Conversational AI
Soniox STT (Async)
field · 33 models
lower-left is better
general
legal
medical
noisy
technical
uk
us
Latency p99
3.9s
6.2s
Final drain
185ms
—
Real-time factor
1.01×
—
Flicker
10.5%
—
Cadence
0.8/s
—
$10.08
1,000 hours
$349.20
$100.80
No
Auto-detect language
No
Yes
Live / streaming
Yes
No
Custom vocabulary
Yes
No
Max file size
2 GB
No limit
Max duration
No limit
5 h
Compliance
—
Is Nova-2 Conversational AI or Soniox STT (Async) more accurate?
Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 18.2% for Nova-2 Conversational AI, on our standardized benchmark.
Which is cheaper, Nova-2 Conversational AI or Soniox STT (Async)?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0058/min for Nova-2 Conversational AI.
Should you choose Nova-2 Conversational AI or Soniox STT (Async)?
Soniox STT (Async) is the stronger choice overall, leading on accuracy, speed, lower cost, and language coverage.
