2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Soniox STT (Async) leads on raw accuracy; Gladia Solaria-3 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
Gladia Solaria-3
0.2× realtime
Gladia
Most languages
Soniox STT (Async)
25 languages
Soniox
Cheapest
Soniox STT (Async)
$0.0017/min
Soniox
Comparing
2 models · same benchmark
1
Gladia Solaria-3
Gladia
Gladia Solaria-3 — EU-hosted batch speech-to-text tuned for the most accurate business audio across five core European languages (English, French, German, Spanish, Italian), with speaker diarization, custom vocabulary, and word-level timestamps.
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.
30-day benchmark average
overall WER vs price
Gladia Solaria-3
Soniox STT (Async)
field · 33 models
lower-left is better
WER · lower is better
WER · English
p50 → p99
Streaming benchmark averages
Rolling 30 days
billed per second
Feature support
Languages · formats · regions
general
legal
medical
noisy
—
technical
—
uk
us
Latency p99
7.7s
6.2s
$10.08
1,000 hours
$608.40
$100.80
No
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
Yes
No
Max file size
1000 MB
No limit
Max duration
2 h 15 min
5 h
Compliance
—
Is Gladia Solaria-3 or Soniox STT (Async) more accurate?
Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 9.8% for Gladia Solaria-3, on our standardized benchmark.
Which is cheaper, Gladia Solaria-3 or Soniox STT (Async)?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0101/min for Gladia Solaria-3.
Should you choose Gladia Solaria-3 or Soniox STT (Async)?
Choose Gladia Solaria-3 for speed; choose Soniox STT (Async) for accuracy, lower cost, and language coverage.
